refactor: rename cli-v2 → cli, archive legacy cli, plus broker-side grants + auto-migrate

- apps/cli/ is now the canonical CLI (was apps/cli-v2/).
- apps/cli/ legacy v0 archived as branch 'legacy-cli-archive' and tag
  'cli-v0-legacy-final' before deletion; git history preserves it too.
- .github/workflows/release-cli.yml paths updated.
- pnpm-lock.yaml regenerated.

Broker-side peer-grant enforcement (spec: 2026-04-15-per-peer-capabilities):
- 0020_peer-grants.sql adds peer_grants jsonb + GIN index on mesh.member.
- handleSend in broker fetches recipient grant maps once per send, drops
  messages silently when sender lacks the required capability.
- POST /cli/mesh/:slug/grants to update from CLI; broker_messages_dropped_by_grant_total metric.
- CLI grant/revoke/block now mirror to broker via syncToBroker.

Auto-migrate on broker startup:
- apps/broker/src/migrate.ts runs drizzle migrate with pg_advisory_lock
  before the HTTP server binds. Exits non-zero on failure so Coolify
  healthcheck fails closed.
- Dockerfile copies packages/db/migrations into /app/migrations.
- postgres 3.4.5 added as direct broker dep.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/cli/src/commands/whoami.ts

@@ -0,0 +1,26 @@
+import { whoAmI } from "~/services/auth/facade.js";
+import { dim, icons } from "~/ui/styles.js";
+import { EXIT } from "~/constants/exit-codes.js";
+
+export async function whoami(opts: { json?: boolean }): Promise<number> {
+  const result = await whoAmI();
+
+  if (opts.json) {
+    console.log(JSON.stringify({ schema_version: "1.0", ...result }, null, 2));
+    return EXIT.SUCCESS;
+  }
+
+  if (!result.signed_in) {
+    console.log(`  Not signed in. Run \`claudemesh login\` to sign in.`);
+    return EXIT.AUTH_FAILED;
+  }
+
+  console.log(`\n  Signed in as ${result.user!.display_name} (${result.user!.email})`);
+  console.log(`  Token source: ${result.token_source} ${dim("(~/.claudemesh/auth.json)")}`);
+  if (result.meshes) {
+    console.log(`  Meshes: ${result.meshes.owned} owned, ${result.meshes.guest} guest`);
+  }
+  console.log();
+
+  return EXIT.SUCCESS;
+}