feat(storage): add delete_href method to remove files and clean up empty directories

chore(docker): remove MongoDB service and related configurations from local setup

feat(migrations): create ChapterMeta table and add search_name, size_bytes, mtime_epoch, lastScannedAt, review_status, and review_payload columns to SourceAsset

chore(dependencies): remove motor and pymongo from project dependencies

docker-compose.yml

@@ -23,7 +23,7 @@ services:
       retries: 5
       start_period: 20s
 
-  # Local mode API: binds to local Postgres/Mongo containers.
+  # Local mode API: binds to local Postgres container.
   api-local:
     build:
       context: .
@@ -35,7 +35,6 @@ services:
       - .env
     environment:
       DATABASE_URL: postgresql://reader:reader@postgres:5432/reader
-      MONGODB_URI: mongodb://mongo:27017/reader
       NAS_CONTENT_ROOT: ${NAS_CONTENT_ROOT:-/data/content}
       EPUB_SOURCE_ROOT: ${EPUB_SOURCE_ROOT:-/data/epub-source}
     ports:
@@ -53,8 +52,6 @@ services:
     depends_on:
       postgres:
         condition: service_healthy
-      mongo:
-        condition: service_healthy
 
   web:
     build:
@@ -97,23 +94,8 @@ services:
       timeout: 5s
       retries: 10
 
-  mongo:
-    image: mongo:7
-    container_name: reader-api-mongo
-    profiles: ["localdb"]
-    ports:
-      - "27017:27017"
-    volumes:
-      - mongo_data:/data/db
-    healthcheck:
-      test: ["CMD", "mongosh", "--quiet", "--eval", "db.adminCommand('ping').ok"]
-      interval: 10s
-      timeout: 5s
-      retries: 10
-
 volumes:
   web_uploads:
   postgres_data:
-  mongo_data:
   nas_chapter_content:
   nas_epub_source: