Fix CLI mismatches from bd-2fs7 (wisp->ephemeral) (gt-pu1t5)

bd-2fs7 moved wisp/pour under bd mol, but gastown was not updated.
This caused handoff failures - gt mail send errored with 'unknown flag: --wisp'.

Changes:
- router.go: --wisp -> --ephemeral for bd create
- patrol_helpers.go: bd wisp create -> bd mol wisp create
- wisp_check.go: bd wisp gc -> bd mol wisp gc

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

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

internal/doctor/wisp_check.go

@@ -124,15 +124,15 @@ func (c *WispGCCheck) countAbandonedWisps(rigPath string) int {
 	return count
 }
 
-// Fix runs bd wisp gc in each rig with abandoned wisps.
+// Fix runs bd mol wisp gc in each rig with abandoned wisps.
 func (c *WispGCCheck) Fix(ctx *CheckContext) error {
 	var lastErr error
 
 	for rigName := range c.abandonedRigs {
 		rigPath := filepath.Join(ctx.TownRoot, rigName)
 
-		// Run bd --no-daemon wisp gc
-		cmd := exec.Command("bd", "--no-daemon", "wisp", "gc")
+		// Run bd --no-daemon mol wisp gc
+		cmd := exec.Command("bd", "--no-daemon", "mol", "wisp", "gc")
 		cmd.Dir = rigPath
 		if output, err := cmd.CombinedOutput(); err != nil {
 			lastErr = fmt.Errorf("%s: %v (%s)", rigName, err, string(output))