refactor(database): improve database initialization and backup handling

- Rename init script from init.sh to 00_init.sh for better ordering
- Rewrite database initialization script to support backup restoration
- Add proper migration handling with schema_migrations table
- Fix indentation and quoting issues in docker-compose.yml
- Remove old 00-init-db.sh script as it's replaced by new implementation

docker-compose.yml

@@ -101,7 +101,7 @@ services:
         target: /docker-entrypoint-initdb.d/migrations
         consistency: cached
       - type: bind
-        source: ./worklenz-backend/database/init.sh
+        source: ./worklenz-backend/database/00_init.sh
         target: /docker-entrypoint-initdb.d/00_init.sh
         consistency: cached
       - type: bind
@@ -114,12 +114,14 @@ services:
           elif command -v apk >/dev/null 2>&1; then
             apk add --no-cache dos2unix
           fi
-          find /docker-entrypoint-initdb.d -type f -name "*.sh" -exec sh -c "
+
+          find /docker-entrypoint-initdb.d -type f -name "*.sh" -exec sh -c '"'"'
             for f; do
-              dos2unix \"\$f\" 2>/dev/null || true
-              chmod +x \"\$f\"
+              dos2unix "$f" 2>/dev/null || true
+              chmod +x "$f"
             done
-          " sh {} +
+          '"'"' sh {} +
+
           exec docker-entrypoint.sh postgres
         '
   db-backup:
@@ -136,12 +138,12 @@ services:
       - ./pg_backups:/pg_backups #host dir for backups files
     #setup bassh loop to backup data evey 24h
     command: >
-      bash -c "while true; do
-                sleep 86400;
-                PGPASSWORD=$$POSTGRES_PASSWORD pg_dump -h worklenz_db -U $$POSTGRES_USER -d $$POSTGRES_DB \
-              > /pg_backups/worklenz_db_$(date +%Y-%m-%d_%H-%M-%S).sql;
-              find /pg_backups -type f -name '*.sql' -mtime +30 -delete;
-      done"
+          bash -c "while true; do
+            sleep 86400;
+            PGPASSWORD=$$POSTGRES_PASSWORD pg_dump -h worklenz_db -U $$POSTGRES_USER -d $$POSTGRES_DB \
+            > /pg_backups/worklenz_db_\$(date +%Y-%m-%d_%H-%M-%S).sql;
+            find /pg_backups -type f -name '*.sql' -mtime +30 -delete;
+          done"
     restart: unless-stopped
     networks:
       - worklenz