feat(buglog): status field, buglog skill, status-driven gitea-sync

The buglog had no status field, so "is this bug open?" meant reading free
text, and gitea-sync closed any issue whose `fix` text was non-empty --
including "NOT FIXED"/"PENDING"/"PARTIALLY FIXED" ones (bug-1855).

- Backfill `status` (+ status_updated) on all 1,193 entries. The 85 entries
  whose text said not-fixed/pending/out-of-scope were checked against HEAD
  and git history; the rest are `fixed`. Result: 36 open, 10 partial,
  2 investigating, 5 cannot-reproduce, 4 wontfix, 1 duplicate.
  Insert-only diff: existing lines are untouched.
- .claude/rules/buglog-status.md defines the status values (kept out of
  openwolf.md, which `openwolf update` overwrites).
- scripts/buglog.py + buglog skill: add (next free id), status, note,
  recur, list, show, triage. Edits only the touched entry's lines; a full
  json.dumps rewrite churns ~1,200 lines of mixed \u-escaping.
- gitea-sync (script + skill): state and a single bug:<status> label come
  from `status`; reopen supported; issues shared by several entries follow
  the most-open one; only status labels are swapped; per-entry write-back
  with gitea_synced_status so unchanged entries cost no API calls; list-typed
  `fix` no longer crashes; spec issues close on done phases (spec.json has
  no implementation approval); --since no longer floods Gitea after the
  backfill.
- Disable OpenWolf buglog auto-detection: its hook numbers new entries
  len(bugs)+1, which collides with existing ids (bug-1856, upstream).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

.wolf/config.json

@@ -2,6 +2,9 @@
   "version": 1,
   "openwolf": {
     "enabled": true,
+    "buglog": {
+      "auto_detect": false
+    },
     "anatomy": {
       "auto_scan_on_init": true,
       "rescan_interval_hours": 6,
@@ -116,4 +119,4 @@
       }
     }
   }
-}
+}