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/migrations.go

@@ -48,6 +48,7 @@ var migrationsList = []Migration{
 	{"created_by_column", migrations.MigrateCreatedByColumn},
 	{"agent_fields", migrations.MigrateAgentFields},
 	{"mol_type_column", migrations.MigrateMolTypeColumn},
+	{"hooked_status_migration", migrations.MigrateHookedStatus},
 }
 
 // MigrationInfo contains metadata about a migration for inspection