feat(oidc): add fine grained access control (#91)

* feat(access-control): fine grain tokens

* fix(docs): clean wording

* test(access-control): add tests for team extraction from access tokens and bucket info permissions

* test(vocabulary): add test for ExpandGlob function to reject non-glob patterns

* feat(helm): add multi-user access control documentation and schema support

backend/internal/models/admin.go

@@ -86,6 +86,10 @@ type GarageBucketInfo struct {
 	UnfinishedMultipartUploadParts int64                `json:"unfinishedMultipartUploadParts"`
 	UnfinishedMultipartUploadBytes int64                `json:"unfinishedMultipartUploadBytes"`
 	Quotas                         *BucketQuotas        `json:"quotas,omitempty"`
+
+	// EffectivePermissions is the caller's prefix-scoped permissions on this
+	// bucket, computed server-side. Omitted when access control is disabled.
+	EffectivePermissions []string `json:"effective_permissions,omitempty"`
 }
 
 // BucketWebsiteConfig represents website configuration for a bucket

backend/internal/models/responses.go

@@ -48,6 +48,10 @@ type BucketInfo struct {
 	WebsiteAccess bool                 `json:"websiteAccess"`
 	WebsiteConfig *BucketWebsiteConfig `json:"websiteConfig,omitempty"`
 	Quotas        *BucketQuotas        `json:"quotas,omitempty"`
+
+	// EffectivePermissions is the caller's prefix-scoped permissions on this
+	// bucket, computed server-side. Omitted when access control is disabled.
+	EffectivePermissions []string `json:"effective_permissions,omitempty"`
 }
 
 // BucketListResponse represents a list of buckets