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/mongoose/lib/helpers/schema/applyReadConcern.js

@@ -0,0 +1,20 @@
+'use strict';
+
+module.exports = function applyReadConcern(schema, options) {
+  if (options.readConcern !== undefined) {
+    return;
+  }
+
+  // Don't apply default read concern to operations in transactions,
+  // because you shouldn't set read concern on individual operations
+  // within a transaction.
+  // See: https://www.mongodb.com/docs/manual/reference/read-concern/
+  if (options && options.session && options.session.transaction) {
+    return;
+  }
+
+  const level = schema.options?.readConcern?.level;
+  if (level != null) {
+    options.readConcern = { level };
+  }
+};