feat: Add 'hooked' status for GUPP work assignment (bd-s00m)

Separates semantics of 'pinned' (identity records) from work-on-hook:
- 'pinned' = domain table / identity record (agents, roles) - non-blocking
- 'hooked' = work on agent's hook (GUPP-driven) - blocks dependents

Changes:
- Add StatusHooked constant to types.go
- Update all blocking queries to include 'hooked' status
- Add cyan styling for 'hooked' in UI output
- Create migration 032 to convert pinned work items to hooked

Generated with Claude Code

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/storage/sqlite/blocked_cache.go

@@ -146,7 +146,7 @@ func (s *SQLiteStorage) rebuildBlockedCache(ctx context.Context, exec execer) er
 		    FROM dependencies d
 		    JOIN issues blocker ON d.depends_on_id = blocker.id
 		    WHERE d.type = 'blocks'
-		      AND blocker.status IN ('open', 'in_progress', 'blocked', 'deferred')
+		      AND blocker.status IN ('open', 'in_progress', 'blocked', 'deferred', 'hooked')
 
 		    UNION