Pixelfed places: a remote post's own place, shown and never federated again

A Note's `location` that is a Place with coordinates (Pixelfed sends
them as strings) is kept in the new Post.Place and shown as
Status.privapub.place {name, latitude, longitude, country}; an edit
replaces it. An Event's location stays its own `places`, and nothing
renders a place back out. Closes the INTEROP P2 Pixelfed location gap
and the ROADMAP long-tail item.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

docs/INTEROP.md

@@ -631,8 +631,10 @@ attachment. The player is a card whose iframe loads from the remote host, which
 - **Gaps:**
   - **P1 outbound:** keep JPEG/PNG renditions with an explicit `mediaType`.
   - **P1 inbound:** Loops' `preview` poster.
-  - **P2:** Pixelfed `location` → own `privapub.place`, display only and never re-federated; `commentsEnabled: false`
-    disables replies.
+  - ~~**P2:** Pixelfed `location` → own `privapub.place`, display only and never re-federated~~ done:
+    `ObjectShapes.NotePlace` keeps a `Place` with coordinates (Pixelfed sends them as strings) in `Post.Place`, an edit
+    replaces it, and nothing renders it back out.
+  - **P2:** `commentsEnabled: false` disables replies.
   - **P3:** ignore `Add{Story}` without an error; answer `FeatureRequest` with `Reject`.
 
 ### Long-form: WordPress plugin 9.3.1, Ghost 6, WriteFreely 0.17.2

docs/ROADMAP.md

@@ -594,7 +594,7 @@ it, raw where it doesn't.
   - Misskey actor extras;
   - book reviews (`relatedWith`, `rating`);
   - Funkwhale and Castopod metadata;
-  - Pixelfed `place` (display only, never re-federated);
+  - ~~Pixelfed `place` (display only, never re-federated)~~ done 2026-10-04: `Post.Place`, `privapub.place`;
   - Bluesky bridging per persona.
 
 ### Sweep and statistics (T and M, planned 2026-10-03, between P6 and P7)