fix(analytics): directory bind mount + inode-based auto-reopen

- docker-compose.prod.yml: replace file bind mount for analytics.duckdb
  with directory bind mount (/opt/padelnomics/data:/app/data/pipeline:ro)
  so os.rename() on the host is visible inside the container
- Override SERVING_DUCKDB_PATH to /app/data/pipeline/analytics.duckdb in
  all 6 blue/green services (removes dependency on .env value)
- analytics.py: track file inode; call _check_and_reopen() at start of
  each query — transparently picks up new analytics.duckdb without restart
  when export_serving.py atomically replaces it after each pipeline run

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.prod.yml

@@ -59,10 +59,10 @@ services:
     env_file: ./.env
     environment:
       - DATABASE_PATH=/app/data/app.db
-      - SERVING_DUCKDB_PATH=/app/data/analytics.duckdb
+      - SERVING_DUCKDB_PATH=/app/data/pipeline/analytics.duckdb
     volumes:
       - app-data:/app/data
-      - /data/padelnomics/analytics.duckdb:/app/data/analytics.duckdb:ro
+      - /opt/padelnomics/data:/app/data/pipeline:ro
     networks:
       - net
     healthcheck:
@@ -81,10 +81,10 @@ services:
     env_file: ./.env
     environment:
       - DATABASE_PATH=/app/data/app.db
-      - SERVING_DUCKDB_PATH=/app/data/analytics.duckdb
+      - SERVING_DUCKDB_PATH=/app/data/pipeline/analytics.duckdb
     volumes:
       - app-data:/app/data
-      - /data/padelnomics/analytics.duckdb:/app/data/analytics.duckdb:ro
+      - /opt/padelnomics/data:/app/data/pipeline:ro
     networks:
       - net
 
@@ -97,10 +97,10 @@ services:
     env_file: ./.env
     environment:
       - DATABASE_PATH=/app/data/app.db
-      - SERVING_DUCKDB_PATH=/app/data/analytics.duckdb
+      - SERVING_DUCKDB_PATH=/app/data/pipeline/analytics.duckdb
     volumes:
       - app-data:/app/data
-      - /data/padelnomics/analytics.duckdb:/app/data/analytics.duckdb:ro
+      - /opt/padelnomics/data:/app/data/pipeline:ro
     networks:
       - net
 
@@ -114,10 +114,10 @@ services:
     env_file: ./.env
     environment:
       - DATABASE_PATH=/app/data/app.db
-      - SERVING_DUCKDB_PATH=/app/data/analytics.duckdb
+      - SERVING_DUCKDB_PATH=/app/data/pipeline/analytics.duckdb
     volumes:
       - app-data:/app/data
-      - /data/padelnomics/analytics.duckdb:/app/data/analytics.duckdb:ro
+      - /opt/padelnomics/data:/app/data/pipeline:ro
     networks:
       - net
     healthcheck:
@@ -136,10 +136,10 @@ services:
     env_file: ./.env
     environment:
       - DATABASE_PATH=/app/data/app.db
-      - SERVING_DUCKDB_PATH=/app/data/analytics.duckdb
+      - SERVING_DUCKDB_PATH=/app/data/pipeline/analytics.duckdb
     volumes:
       - app-data:/app/data
-      - /data/padelnomics/analytics.duckdb:/app/data/analytics.duckdb:ro
+      - /opt/padelnomics/data:/app/data/pipeline:ro
     networks:
       - net
 
@@ -152,10 +152,10 @@ services:
     env_file: ./.env
     environment:
       - DATABASE_PATH=/app/data/app.db
-      - SERVING_DUCKDB_PATH=/app/data/analytics.duckdb
+      - SERVING_DUCKDB_PATH=/app/data/pipeline/analytics.duckdb
     volumes:
       - app-data:/app/data
-      - /data/padelnomics/analytics.duckdb:/app/data/analytics.duckdb:ro
+      - /opt/padelnomics/data:/app/data/pipeline:ro
     networks:
       - net