feat: migrate k-ap 0.1.10→0.3.1, fix AP gaps

- split FederationRepository into FollowRepository, ActorRepository, BlocklistRepository, ActivityRepository
- RemoteActor: 5 new fields (bio, banner_url, followers_url, following_url, also_known_as)
- ApObjectHandler split: get_local_objects_page/count_local_posts → ApContentReader trait
- builder API: positional args → named setters
- broadcast_create_note/update_note: add ApVisibility + mentioned_inboxes params
- backfill_outbox → import_remote_outbox
- ApUser: also_known_as Option<String> → Vec<String>, new fields

AP gaps fixed:
- add GET /users/{id}/followers + /following with content negotiation
- wire EventPublisher into builder via FederationEventBridge adapter
- add display_name field full stack (domain→DB→API→AP)
- DB-side outbox pagination (get_local_reviews_page)
- set featured_url on ApUser

crates/adapters/postgres-federation/Cargo.toml

@@ -11,12 +11,12 @@ sqlx = { version = "0.8.6", features = [
     "macros",
     "chrono",
 ] }
-activitypub      = { workspace = true }
-k-ap             = { git = "https://git.gabrielkaszewski.dev/GKaszewski/k-ap.git", tag = "v0.1.10" }
-domain           = { workspace = true }
-uuid             = { workspace = true }
-chrono           = { workspace = true }
-tracing          = { workspace = true }
-async-trait      = { workspace = true }
-anyhow           = { workspace = true }
-
+activitypub = { workspace = true }
+k-ap = { version = "0.3.1", registry = "gitea" }
+domain = { workspace = true }
+uuid = { workspace = true }
+chrono = { workspace = true }
+tracing = { workspace = true }
+async-trait = { workspace = true }
+anyhow = { workspace = true }
+serde_json = { workspace = true }