Unify API auth + RFC-compliant CRL/OCSP (M-002 + M-003 + M-006, auto-closes M-001)

Closes the remaining P1 gaps from coverage-gap-audit.md (M-001/M-002/M-003/M-006)
on top of the C-001/C-002 ownership + agent-FK contract fixes landed in
a53a4b8. The work lands as a single commit spanning server, docs, tests,
and the React client.

M-002 — Named API keys with per-key actor propagation
  * Migration 000014 adds the 'api_keys' table (id, name, hash,
    principal, role, created_at, last_used_at, disabled_at) so every
    credential carries an identifiable principal instead of the
    opaque 'anonymous'/'api-key' sentinel.
  * Auth middleware now rotates through configured keys, performs
    constant-time hash comparison, stamps 'last_used_at', and emits
    an actor struct via contextWithActor(). The audit middleware,
    bulk-revocation handler, approval handlers, and MCP tool layer
    now read the principal off the context and persist it on every
    audit_events row.
  * Regression coverage:
      - internal/api/middleware/audit_test.go — actor propagation,
        principal redaction for disabled keys, anonymous fallback for
        unauthenticated endpoints.
      - internal/api/handler/bulk_revocation_handler_test.go,
        job_handler_test.go — principal-on-audit assertions.

M-003 — Authorization gates (Phase B)
  * Approval handler rejects self-approval / self-rejection with 403
    when the actor principal equals the job's requested_by field.
  * Bulk revocation is gated behind the 'admin' role; operators and
    viewers receive 403.
  * Regression coverage:
      - internal/service/job_test.go — TestApproveJob_NotSelf,
        TestRejectJob_NotSelf.
      - internal/api/handler/bulk_revocation_handler_test.go —
        TestBulkRevoke_RequiresAdmin, TestBulkRevoke_AdminSucceeds.

M-006 — RFC-compliant CRL/OCSP on the unauthenticated .well-known mux
  * Per RFC 8615, relying parties cannot reasonably be asked to
    authenticate against the issuing certctl instance to retrieve
    revocation material. CRL and OCSP move off the authenticated
    '/api/v1/crl*' and '/api/v1/ocsp/*' paths onto:
        GET /.well-known/pki/crl/{issuer_id}
            Content-Type: application/pkix-crl   (RFC 5280 §5)
        GET /.well-known/pki/ocsp/{issuer_id}/{serial}
            Content-Type: application/ocsp-response  (RFC 6960)
  * Non-standard JSON CRL shape is removed; only DER is served.
  * Short-lived certificate exemption (profile TTL < 1h → skip
    CRL/OCSP) is preserved; the response simply omits the serial.
  * Routes are registered on the unauthenticated 'finalHandler' mux
    in cmd/server/main.go alongside EST ('/.well-known/est/*') and
    SCEP ('/scep'). Legacy authenticated paths return 404.
  * Regression coverage:
      - internal/api/handler/certificate_handler_test.go — content
        type, DER parseability, 404 for unknown issuer.
      - internal/api/handler/adversarial_path_test.go — unauthenticated
        access asserted for CRL, OCSP, EST, SCEP.
      - internal/api/router/router_test.go — route-table assertion
        that '.well-known/pki/*', '.well-known/est/*', and '/scep' are
        mounted on the unauthenticated branch.

M-001 — Auto-closed by M-002
  EST and SCEP were already registered on the unauthenticated
  'finalHandler' mux; the router comment at
  internal/api/router/router.go:247 now matches reality. The
  adversarial-path tests above lock the behavior in.

Verification (all gates green):
  * go vet ./...                                           — clean
  * go build ./...                                         — ok
  * go test -short ./... (55+ packages)                    — all pass
  * web/ : npm test (225 Vitest tests)                     — all pass
  * web/ : npx tsc --noEmit                                — clean
  * grep sweep for '/api/v1/(crl|ocsp)' — 13 surviving hits,
    all intentional M-006 tombstone/relocation comments.

Documentation:
  * coverage-gap-audit.md — status flips M-001/M-002/M-003/M-006 →
    Fixed, with per-finding resolution paragraphs citing regression
    test IDs. (Audit file lives outside this repo; see cowork root.)
  * CLAUDE.md Project Status line updated with the auth-unification
    closure note.
  * docs/features.md, docs/architecture.md, docs/quickstart.md,
    docs/concepts.md, docs/connectors.md, docs/test-env.md,
    docs/testing-guide.md, docs/compliance-*.md, docs/demo-advanced.md
    — refreshed for the new '.well-known/pki/*' namespace and named
    API keys.
  * api/openapi.yaml — documents the new unauthenticated endpoints
    and removes the legacy '/api/v1/crl*' + '/api/v1/ocsp/*' paths.

.gitignore: adds '/.gocache/' and '/.gomodcache/' for the session-
scoped Go caches so they never enter the tree.

internal/mcp/client_test.go

@@ -203,7 +203,7 @@ func TestClient_GetRaw(t *testing.T) {
 	defer server.Close()
 
 	c := NewClient(server.URL, "test-key")
-	data, contentType, err := c.GetRaw("/api/v1/crl/iss-local")
+	data, contentType, err := c.GetRaw("/.well-known/pki/crl/iss-local")
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
@@ -223,7 +223,7 @@ func TestClient_GetRaw_Error(t *testing.T) {
 	defer server.Close()
 
 	c := NewClient(server.URL, "test-key")
-	_, _, err := c.GetRaw("/api/v1/crl/nonexistent")
+	_, _, err := c.GetRaw("/.well-known/pki/crl/nonexistent")
 	if err == nil {
 		t.Fatal("expected error for 404 response")
 	}

internal/mcp/tools.go

@@ -217,24 +217,19 @@ func registerCertificateTools(s *gomcp.Server, c *Client) {
 }
 
 // ── CRL & OCSP ──────────────────────────────────────────────────────
+//
+// M-006 relocation: CRL and OCSP are served unauthenticated under the
+// RFC 8615 `.well-known/pki/*` namespace (RFC 5280 §5 for CRL, RFC 6960
+// §2.1 for OCSP) so relying parties can retrieve them without a certctl
+// API key. The non-standard JSON CRL tool (`certctl_get_crl`) has been
+// removed — RFC 5280 defines only the DER wire format.
 
 func registerCRLOCSPTools(s *gomcp.Server, c *Client) {
-	gomcp.AddTool(s, &gomcp.Tool{
-		Name:        "certctl_get_crl",
-		Description: "Get the Certificate Revocation List in JSON format. Lists all revoked certificate serial numbers with reasons and timestamps.",
-	}, func(ctx context.Context, req *gomcp.CallToolRequest, input EmptyInput) (*gomcp.CallToolResult, any, error) {
-		data, err := c.Get("/api/v1/crl", nil)
-		if err != nil {
-			return errorResult(err)
-		}
-		return textResult(data)
-	})
-
 	gomcp.AddTool(s, &gomcp.Tool{
 		Name:        "certctl_get_der_crl",
-		Description: "Get DER-encoded X.509 CRL for a specific issuer. Returns binary CRL data signed by the issuing CA.",
+		Description: "Get DER-encoded X.509 CRL for a specific issuer (RFC 5280). Served unauthenticated at /.well-known/pki/crl/{issuer_id}. Returns binary CRL data signed by the issuing CA.",
 	}, func(ctx context.Context, req *gomcp.CallToolRequest, input GetDERCRLInput) (*gomcp.CallToolResult, any, error) {
-		raw, contentType, err := c.GetRaw("/api/v1/crl/" + input.IssuerID)
+		raw, contentType, err := c.GetRaw("/.well-known/pki/crl/" + input.IssuerID)
 		if err != nil {
 			return errorResult(err)
 		}
@@ -247,9 +242,9 @@ func registerCRLOCSPTools(s *gomcp.Server, c *Client) {
 
 	gomcp.AddTool(s, &gomcp.Tool{
 		Name:        "certctl_ocsp_check",
-		Description: "Check OCSP status for a certificate by issuer ID and hex serial number. Returns good, revoked, or unknown.",
+		Description: "Check OCSP status for a certificate by issuer ID and hex serial number (RFC 6960). Served unauthenticated at /.well-known/pki/ocsp/{issuer_id}/{serial}. Returns good, revoked, or unknown.",
 	}, func(ctx context.Context, req *gomcp.CallToolRequest, input OCSPInput) (*gomcp.CallToolResult, any, error) {
-		raw, contentType, err := c.GetRaw("/api/v1/ocsp/" + input.IssuerID + "/" + input.Serial)
+		raw, contentType, err := c.GetRaw("/.well-known/pki/ocsp/" + input.IssuerID + "/" + input.Serial)
 		if err != nil {
 			return errorResult(err)
 		}

internal/mcp/tools_test.go

@@ -378,7 +378,7 @@ func TestToolEndToEnd_GetRawBinary(t *testing.T) {
 	defer server.Close()
 
 	client := NewClient(server.URL, "test-key")
-	data, ct, err := client.GetRaw("/api/v1/crl/iss-local")
+	data, ct, err := client.GetRaw("/.well-known/pki/crl/iss-local")
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}