feat(federation): enrich RemoteActor with bio, banner, followers/following URLs

Bumps k-ap to 0.3.1 which adds bio, banner_url, followers_url,
following_url, and also_known_as to RemoteActor. These are populated
from fetched actor JSON at follow/ingest time so followers and following
listings no longer return null profile fields.

Adds migration 015 for the new remote_actors columns, updates all JOIN
queries in postgres-federation to select and return the new fields, and
maps them through k_ap_actor_to_domain.

Also fixes clippy: remove empty line after doc comment in port.rs.

crates/adapters/activitypub/Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-k-ap = { version = "0.3.0", registry = "gitea" }
+k-ap = { version = "0.3.1", registry = "gitea" }
 domain = { workspace = true }
 url = { workspace = true }
 serde = { workspace = true }

crates/adapters/activitypub/src/port.rs

@@ -73,7 +73,6 @@ pub trait ActivityPubRepository: Send + Sync {
     // ── Inbox processing (remote → local) ───────────────────────────
 
     /// Persist an incoming remote Note. Idempotent on ap_id.
-
     async fn accept_note(&self, input: AcceptNoteInput<'_>) -> Result<ThoughtId, DomainError>;
 
     /// Apply an Update to a previously accepted remote Note.

crates/adapters/activitypub/src/service.rs

@@ -114,11 +114,11 @@ fn k_ap_actor_to_domain(a: k_ap::RemoteActor) -> DomainRemoteActor {
         avatar_url: a.avatar_url,
         outbox_url: a.outbox_url,
         last_fetched_at: chrono::Utc::now(),
-        bio: None,
-        banner_url: None,
-        also_known_as: None,
-        followers_url: None,
-        following_url: None,
+        bio: a.bio,
+        banner_url: a.banner_url,
+        also_known_as: a.also_known_as.into_iter().next(),
+        followers_url: a.followers_url,
+        following_url: a.following_url,
         attachment: vec![],
     }
 }