Migrate data storage from Couchbase to Redis

Replaces Couchbase with Redis for data persistence, updating environment variables, Docker Compose files, and repository logic. Removes Couchbase and Jackson dependencies, introduces Gson for JSON serialization, and refactors models and repositories to support Redis. Adds utility classes for Redis and Gson, and updates tests and scrapers to use Gson.

compose.dev.yml

@@ -1,18 +1,12 @@
 services:
-  couchbase:
-    image: couchbase:community-7.6.2
-    env_file:
-      - .env
+  redis:
+    image: redis:7.2-alpine
     ports:
-      - "8091-8097:8091-8097"
-      - "9123:9123"
-      - "11207:11207"
-      - "11210:11210"
-      - "11280:11280"
-      - "18091-18097:18091-18097"
+      - "6379:6379"
     volumes:
-      - couchbase_data:/opt/couchbase/var
+      - redis_data:/data
     restart: unless-stopped
+    command: redis-server --appendonly yes
 
 volumes:
-  couchbase_data:
+  redis_data: