feat(869-c1): activation-capability probe (Part of #869)

Part of #869

Mos (id-11) Gate-16 merge: independent 3-round APPROVE @c5a2bcc5, author id2 != approver id11, CI green wp1973.

Co-authored-by: jason.woltje <jason@diversecanvas.com>
Co-committed-by: jason.woltje <jason@diversecanvas.com>

packages/mosaic/src/cli.ts

@@ -21,6 +21,7 @@ import { registerRestoreCommand } from './commands/restore.js';
 import { registerSkillCommand } from './commands/skill.js';
 // prdy is registered via launch.ts
 import { registerLaunchCommands } from './commands/launch.js';
+import { registerLeaseCapabilityProbe } from './commands/lease-activation-probe.js';
 import { registerAuthCommand } from './commands/auth.js';
 import { registerFederationCommand } from './commands/federation.js';
 import { registerGatewayCommand } from './commands/gateway.js';
@@ -78,6 +79,10 @@ Command Groups:
 
 registerLaunchCommands(program);
 
+// ─── lease activation capability probe (hidden; #869 Point-1 C1) ────────
+
+registerLeaseCapabilityProbe(program);
+
 // ─── login ──────────────────────────────────────────────────────────────
 
 program