hub v0.61.0 + felhom-tenantsync v1.1.0: Customer RESET (middle lifecycle tier)

One operator action returns a customer to pre-first-install: all operational
state dies (offsite repo, PBS namespace+backups, DR recipe, one-time secret,
claim state, retained escrow custody); identity + basic config + provenance +
events survive. Sits between host delete and customer Delete.

- store/customer_reset.go: customer_resets journal, live inventory, ack-gated
  purge (never touches identity/provenance/events), DeleteClaim.
- claim.ResetToUnclaimed: delete claim row -> fresh code next onboarding.
- offsite.Deprovision (idempotent) + OffsiteIdentifier + ClearProvisionedDescriptor.
- tenantsync.Deprovision + felhom-tenantsync.sh deprovision op (destroys ns +
  backup groups + token; shared user untouched; idempotent).
- web/customer_reset.go: GET reset -> inventory JSON; POST -> orchestration
  (external teardown FIRST, DB purge LAST; refuse-while-hosts; typed-id +
  separate escrow ack). Amber RESET card distinct from red Danger-zone Delete.
- Red-proofs: ack-gate + partial-failure resumability (both proven red);
  store ack-gating + journal round-trip; offsite idempotency + descriptor clear;
  RESET-card render. Green: build + vet + test.

hub/internal/web/pbsdr.go

@@ -34,6 +34,9 @@ import (
 type tenancyProvisioner interface {
 	Provision(ctx context.Context, customerID string) (*tenantsync.Result, error)
 	Reissue(ctx context.Context, customerID string) (*tenantsync.Result, error)
+	// Deprovision DESTROYS the customer's PBS namespace + backups + token (customer-RESET teardown,
+	// v0.61.0). Idempotent — existed=false when nothing was there. The shared user is never touched.
+	Deprovision(ctx context.Context, customerID string) (existed bool, err error)
 }
 
 // SetTenantSync enables PBS DR tier provisioning (optional). Without it, saving a config with the