feat: Complete CouchDB migration and Docker configuration

- Add comprehensive CouchDB setup and configuration
- Update Docker files for CouchDB compatibility
- Create Kubernetes manifests for CouchDB deployment
- Add migration scripts and documentation
- Update seeding scripts to support both CouchDB and MongoDB
- Add docker-compose for local development
- Create comprehensive setup and deployment guides

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Co-Authored-By: AI Assistant <noreply@ai-assistant.com>

node_modules/mongodb/src/cmap/auth/x509.ts

@@ -0,0 +1,43 @@
+import type { Document } from '../../bson';
+import { MongoMissingCredentialsError } from '../../error';
+import { ns } from '../../utils';
+import type { HandshakeDocument } from '../connect';
+import { type AuthContext, AuthProvider } from './auth_provider';
+import type { MongoCredentials } from './mongo_credentials';
+
+export class X509 extends AuthProvider {
+  override async prepare(
+    handshakeDoc: HandshakeDocument,
+    authContext: AuthContext
+  ): Promise<HandshakeDocument> {
+    const { credentials } = authContext;
+    if (!credentials) {
+      throw new MongoMissingCredentialsError('AuthContext must provide credentials.');
+    }
+    return { ...handshakeDoc, speculativeAuthenticate: x509AuthenticateCommand(credentials) };
+  }
+
+  override async auth(authContext: AuthContext) {
+    const connection = authContext.connection;
+    const credentials = authContext.credentials;
+    if (!credentials) {
+      throw new MongoMissingCredentialsError('AuthContext must provide credentials.');
+    }
+    const response = authContext.response;
+
+    if (response?.speculativeAuthenticate) {
+      return;
+    }
+
+    await connection.command(ns('$external.$cmd'), x509AuthenticateCommand(credentials), undefined);
+  }
+}
+
+function x509AuthenticateCommand(credentials: MongoCredentials) {
+  const command: Document = { authenticate: 1, mechanism: 'MONGODB-X509' };
+  if (credentials.username) {
+    command.user = credentials.username;
+  }
+
+  return command;
+}