feat(wisp): add misclassified wisp detection and defense-in-depth filtering (#833)

Add CheckMisclassifiedWisps doctor check to detect issues that should be
marked as wisps but aren't. This catches merge-requests, patrol molecules,
and operational work that lacks the wisp:true flag.

Add defense-in-depth wisp filtering to gt ready command. While bd ready
should already filter wisps, this provides an additional layer to ensure
ephemeral operational work doesn't leak into the ready work display.

Changes:
- New doctor check: misclassified-wisps (fixable, CategoryCleanup)
- gt ready now filters wisps from issues.jsonl in addition to scaffolds
- Detects wisp patterns: merge-request type, patrol labels, mol-* IDs

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

internal/cmd/doctor.go

@@ -139,6 +139,7 @@ func runDoctor(cmd *cobra.Command, args []string) error {
 	d.Register(doctor.NewZombieSessionCheck())
 	d.Register(doctor.NewOrphanProcessCheck())
 	d.Register(doctor.NewWispGCCheck())
+	d.Register(doctor.NewCheckMisclassifiedWisps())
 	d.Register(doctor.NewBranchCheck())
 	d.Register(doctor.NewBeadsSyncOrphanCheck())
 	d.Register(doctor.NewCloneDivergenceCheck())