feat: Distinct prefixes for protos, molecules, wisps (bd-hobo)

Added type-specific ID prefixes for better visual recognition:
- `bd pour` now generates IDs with "mol-" prefix
- `bd wisp create` now generates IDs with "wisp-" prefix
- Regular issues continue using the configured prefix

Implementation:
- Added IDPrefix field to types.Issue (internal, not exported to JSONL)
- Added Prefix field to CloneOptions for spawning operations
- Added IDPrefix to RPC CreateArgs for daemon communication
- Updated storage layer to use issue.IDPrefix when generating IDs
- Updated pour.go and wisp.go to pass appropriate prefixes

This enables instant visual recognition of entity types and prevents
accidental modification of templates.

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

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

cmd/bd/wisp.go

@@ -206,7 +206,8 @@ func runWispCreate(cmd *cobra.Command, args []string) {
 	}
 
 	// Spawn as wisp in main database (ephemeral=true sets Wisp flag, skips JSONL export)
-	result, err := spawnMolecule(ctx, store, subgraph, vars, "", actor, true)
+	// bd-hobo: Use "wisp" prefix for distinct visual recognition
+	result, err := spawnMolecule(ctx, store, subgraph, vars, "", actor, true, "wisp")
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "Error creating wisp: %v\n", err)
 		os.Exit(1)