Document sibling registry establishment and sync hub sources

Record bootstrap of state-hub, feature-control, identity-canon, and shard-wiki
registries; hub sync materializes URL sources for all five federated repos.

registry/federation/sources.yaml

@@ -1,51 +1,40 @@
-# Federation manifest for helix_forge capability indexes.
-# Compose with: reuse-surface federation compose
 version: 1
 domain: helix_forge
 collision_policy: warn
-
 sources:
-  - repo: reuse-surface
-    index: registry/indexes/capabilities.yaml
-    enabled: true
-    required: true
-    domain: helix_forge
-    description: Primary local capability registry
-
-  # Enable when sibling repos publish registry/indexes/capabilities.yaml
-  - repo: state-hub
-    index: ~/state-hub/registry/indexes/capabilities.yaml
-    enabled: true
-    required: false
-    domain: helix_forge
-    description: State Hub coordination capabilities
-
-  - repo: feature-control
-    index: ~/feature-control/registry/indexes/capabilities.yaml
-    enabled: true
-    required: false
-    domain: helix_forge
-    description: Feature control domain capabilities
-
-  - repo: identity-canon
-    index: ~/identity-canon/registry/indexes/capabilities.yaml
-    enabled: true
-    required: false
-    domain: helix_forge
-    description: Identity canon research capabilities
-
-  - repo: shard-wiki
-    index: ~/shard-wiki/registry/indexes/capabilities.yaml
-    enabled: true
-    required: false
-    domain: helix_forge
-    description: Shard wiki federation capabilities
-
-  # Remote index example — enable when a repo publishes a raw capabilities.yaml URL
-  - repo: example-remote
-    url: https://example.com/registry/indexes/capabilities.yaml
-    enabled: false
-    required: false
-    domain: helix_forge
-    cache_ttl_seconds: 86400
-    description: Illustrative HTTP federation source (disabled)
+- repo: feature-control
+  url: https://gitea.coulomb.social/coulomb/feature-control/raw/main/registry/indexes/capabilities.yaml
+  enabled: true
+  required: false
+  domain: helix_forge
+  cache_ttl_seconds: 86400
+  auth_header: Authorization
+- repo: identity-canon
+  url: https://gitea.coulomb.social/coulomb/identity-canon/raw/main/registry/indexes/capabilities.yaml
+  enabled: true
+  required: false
+  domain: helix_forge
+  cache_ttl_seconds: 86400
+  auth_header: Authorization
+- repo: reuse-surface
+  url: https://gitea.coulomb.social/coulomb/reuse-surface/raw/main/registry/indexes/capabilities.yaml
+  enabled: true
+  required: false
+  domain: helix_forge
+  description: Capability registry for helix_forge
+  cache_ttl_seconds: 86400
+  auth_header: Authorization
+- repo: shard-wiki
+  url: https://gitea.coulomb.social/coulomb/shard-wiki/raw/main/registry/indexes/capabilities.yaml
+  enabled: true
+  required: false
+  domain: helix_forge
+  cache_ttl_seconds: 86400
+  auth_header: Authorization
+- repo: state-hub
+  url: https://gitea.coulomb.social/coulomb/state-hub/raw/main/registry/indexes/capabilities.yaml
+  enabled: true
+  required: false
+  domain: helix_forge
+  cache_ttl_seconds: 86400
+  auth_header: Authorization