feat: remove ProjectMember, add expose RBAC role, attach/detach-server commands

- Remove ProjectMember model entirely (RBAC manages project access)
- Add 'expose' RBAC role for /mcp-config endpoint access (edit implies expose)
- Rename CLI flags: --llm-provider → --proxy-mode-llm-provider, --llm-model → --proxy-mode-llm-model
- Add attach-server / detach-server CLI commands (mcpctl --project NAME attach-server SERVER)
- Add POST/DELETE /api/v1/projects/:id/servers endpoints for server attach/detach
- Remove members from backup/restore, apply, get, describe
- Prisma migration to drop ProjectMember table

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/cli/tests/commands/get.test.ts

@@ -181,7 +181,6 @@ describe('get command', () => {
       proxyMode: 'filtered',
       ownerId: 'usr-1',
       servers: [{ server: { name: 'grafana' } }],
-      members: [{ user: { email: 'a@b.com' }, role: 'admin' }, { user: { email: 'c@d.com' }, role: 'member' }],
     }]);
     const cmd = createGetCommand(deps);
     await cmd.parseAsync(['node', 'test', 'projects']);
@@ -189,11 +188,9 @@ describe('get command', () => {
     const text = deps.output.join('\n');
     expect(text).toContain('MODE');
     expect(text).toContain('SERVERS');
-    expect(text).toContain('MEMBERS');
     expect(text).toContain('smart-home');
     expect(text).toContain('filtered');
     expect(text).toContain('1');
-    expect(text).toContain('2');
   });
 
   it('displays mixed resource and operation bindings', async () => {