wip: simplify wisp architecture - single db with Wisp flag (bd-bkul)

Progress on eliminating separate .beads-wisp/ directory:

- Add --wisp flag to bd create (creates issue with Wisp=true)
- Update bd wisp create to use main db instead of separate wisp storage
- Update bd wisp list to query main db with Wisp filter
- Update bd wisp gc to work with main database
- Add Wisp field to RPC ListArgs for daemon mode support
- Fix terminology: use "old/abandoned" for time-based cleanup,
  reserve "stale" for graph-pressure staleness (per Gas Town taxonomy)

Still TODO:
- Finish mol squash simplification (remove cross-store logic)
- Remove runWispSquash and squashWispToPermanent functions
- Update mol burn similarly
- Deprecate .beads-wisp/ functions in internal/beads/beads.go
- Test all changes

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

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

cmd/bd/create.go

@@ -107,6 +107,7 @@ var createCmd = &cobra.Command{
 		waitsForGate, _ := cmd.Flags().GetString("waits-for-gate")
 		forceCreate, _ := cmd.Flags().GetBool("force")
 		repoOverride, _ := cmd.Flags().GetString("repo")
+		wisp, _ := cmd.Flags().GetBool("wisp")
 
 		// Get estimate if provided
 		var estimatedMinutes *int
@@ -221,6 +222,7 @@ var createCmd = &cobra.Command{
 				Dependencies:       deps,
 				WaitsFor:           waitsFor,
 				WaitsForGate:       waitsForGate,
+				Wisp:               wisp,
 			}
 
 			resp, err := daemonClient.Create(createArgs)
@@ -265,6 +267,7 @@ var createCmd = &cobra.Command{
 			Assignee:           assignee,
 			ExternalRef:        externalRefPtr,
 			EstimatedMinutes:   estimatedMinutes,
+			Wisp:               wisp,
 		}
 
 		ctx := rootCtx
@@ -443,6 +446,7 @@ func init() {
 	createCmd.Flags().Bool("force", false, "Force creation even if prefix doesn't match database prefix")
 	createCmd.Flags().String("repo", "", "Target repository for issue (overrides auto-routing)")
 	createCmd.Flags().IntP("estimate", "e", 0, "Time estimate in minutes (e.g., 60 for 1 hour)")
+	createCmd.Flags().Bool("wisp", false, "Create as wisp (ephemeral, not exported to JSONL)")
 	// Note: --json flag is defined as a persistent flag in main.go, not here
 	rootCmd.AddCommand(createCmd)
 }