fix(hook): Read hook_bead from database column, not description (gt-7m33w)

The hook discovery code was reading hook_bead from the agent bead's
description field (parsed via ParseAgentFieldsFromDescription), but
the slot update code writes to the hook_bead database column via
'bd slot set'. This mismatch caused polecats to see stale hook values
from the description instead of the current value from the database.

Fixed in:
- molecule_status.go: Use agentBead.HookBead instead of parsing description
- status.go: Use issue.HookBead directly
- lifecycle.go: Update all GUPP and orphan detection to read from
  database columns instead of parsing description

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

internal/cmd/status.go

@@ -174,11 +174,11 @@ func runStatus(cmd *cobra.Command, args []string) error {
 	}
 
 	// Pre-fetch all hook beads (referenced in agent beads) in a single query
+	// Use the HookBead field from the database column, not parsed from description.
 	var allHookIDs []string
 	for _, issue := range allAgentBeads {
-		fields := beads.ParseAgentFields(issue.Description)
-		if fields != nil && fields.HookBead != "" {
-			allHookIDs = append(allHookIDs, fields.HookBead)
+		if issue.HookBead != "" {
+			allHookIDs = append(allHookIDs, issue.HookBead)
 		}
 	}
 	allHookBeads, _ := agentBeads.ShowMultiple(allHookIDs)