Update 17 E2E test files including admin, auth, inquiries, listings,
payments, search, subscriptions, and MCP specs. Update listings fixture
and global setup to align with latest schema changes.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
MCP endpoints already had JwtAuthGuard applied but lacked per-route rate
limiting and test coverage for security behavior. Add @Throttle decorators
with appropriate limits (5 req/min for SSE connections, 30 req/min for
server list and messages), unit tests verifying guard/throttle metadata,
and E2E tests confirming 401 rejection for unauthenticated requests.
Co-Authored-By: Paperclip <noreply@paperclip.ing>
