M-2 PR-C: Collapse Policy/Profile/Owner/Team services to ctx-first signatures

- Add ctx first param to 21 service-layer handler-interface methods
  across policy.go (6), profile.go (5), owner.go (5), team.go (5)
- Replace 24 context.Background() call sites with received ctx; use
  context.WithoutCancel(ctx) for subsidiary audit-recording ops to
  preserve fire-and-forget audit semantics without inheriting caller
  cancellation
- Add ctx first param to 21 handler-interface method signatures across
  policies.go (6), profiles.go (5), owners.go (5), teams.go (5)
- Thread r.Context() through 21 HTTP handler sites (ListPolicies,
  GetPolicy, CreatePolicy, UpdatePolicy, DeletePolicy, ListViolations,
  ListProfiles, GetProfile, CreateProfile, UpdateProfile, DeleteProfile,
  ListOwners, GetOwner, CreateOwner, UpdateOwner, DeleteOwner,
  ListTeams, GetTeam, CreateTeam, UpdateTeam, DeleteTeam)
- Update MockPolicyService/MockProfileService/MockOwnerService/
  MockTeamService mock method impls with _ context.Context first param
  (Fn fields unchanged — closures do not need ctx); update mock impls
  in integration/lifecycle_test.go for all four services
- Update 12 service-layer test callsites (policy_test.go ×2,
  owner_test.go ×5, team_test.go ×5, profile_test.go ×13) to pass
  context.Background() at the call site

Audit complete. Commit: 855124a9d9. Sections: 12. Findings: 2/7/10/4/6.

internal/api/handler/teams.go

@@ -1,6 +1,7 @@
 package handler
 
 import (
+	"context"
 	"encoding/json"
 	"net/http"
 	"strconv"
@@ -12,11 +13,11 @@ import (
 
 // TeamService defines the service interface for team operations.
 type TeamService interface {
-	ListTeams(page, perPage int) ([]domain.Team, int64, error)
-	GetTeam(id string) (*domain.Team, error)
-	CreateTeam(team domain.Team) (*domain.Team, error)
-	UpdateTeam(id string, team domain.Team) (*domain.Team, error)
-	DeleteTeam(id string) error
+	ListTeams(ctx context.Context, page, perPage int) ([]domain.Team, int64, error)
+	GetTeam(ctx context.Context, id string) (*domain.Team, error)
+	CreateTeam(ctx context.Context, team domain.Team) (*domain.Team, error)
+	UpdateTeam(ctx context.Context, id string, team domain.Team) (*domain.Team, error)
+	DeleteTeam(ctx context.Context, id string) error
 }
 
 // TeamHandler handles HTTP requests for team operations.
@@ -53,7 +54,7 @@ func (h TeamHandler) ListTeams(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
-	teams, total, err := h.svc.ListTeams(page, perPage)
+	teams, total, err := h.svc.ListTeams(r.Context(), page, perPage)
 	if err != nil {
 		ErrorWithRequestID(w, http.StatusInternalServerError, "Failed to list teams", requestID)
 		return
@@ -87,7 +88,7 @@ func (h TeamHandler) GetTeam(w http.ResponseWriter, r *http.Request) {
 	}
 	id = parts[0]
 
-	team, err := h.svc.GetTeam(id)
+	team, err := h.svc.GetTeam(r.Context(), id)
 	if err != nil {
 		ErrorWithRequestID(w, http.StatusNotFound, "Team not found", requestID)
 		return
@@ -122,7 +123,7 @@ func (h TeamHandler) CreateTeam(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	created, err := h.svc.CreateTeam(team)
+	created, err := h.svc.CreateTeam(r.Context(), team)
 	if err != nil {
 		ErrorWithRequestID(w, http.StatusInternalServerError, "Failed to create team", requestID)
 		return
@@ -155,7 +156,7 @@ func (h TeamHandler) UpdateTeam(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	updated, err := h.svc.UpdateTeam(id, team)
+	updated, err := h.svc.UpdateTeam(r.Context(), id, team)
 	if err != nil {
 		ErrorWithRequestID(w, http.StatusInternalServerError, "Failed to update team", requestID)
 		return
@@ -182,7 +183,7 @@ func (h TeamHandler) DeleteTeam(w http.ResponseWriter, r *http.Request) {
 	}
 	id = parts[0]
 
-	if err := h.svc.DeleteTeam(id); err != nil {
+	if err := h.svc.DeleteTeam(r.Context(), id); err != nil {
 		ErrorWithRequestID(w, http.StatusInternalServerError, "Failed to delete team", requestID)
 		return
 	}