fix: use separate port for integration tests to avoid conflicts

Integration tests now use port 8099 via docker-compose.test.yml with an
isolated project name, preventing conflicts with other services running
on port 8000.

docker-compose.test.yml

@@ -0,0 +1,10 @@
+services:
+  ffmpeg-worker:
+    build: .
+    ports:
+      - "8099:8000"
+    volumes:
+      - ./data:/data
+    environment:
+      - DATA_PATH=/data
+      - FFMPEG_TIMEOUT=3600

tests/test_integration.py

@@ -8,7 +8,7 @@ import time
 import requests
 import os
 
-WORKER_URL = "http://localhost:8000"
+WORKER_URL = "http://localhost:8099"
 
 
 @pytest.fixture(scope="module")
@@ -29,8 +29,11 @@ def docker_compose():
         "-c:v", "libx264", "-pix_fmt", "yuv420p", test_input
     ], check=True, capture_output=True)
 
-    # Start docker-compose
-    subprocess.run(["docker-compose", "up", "-d", "--build"], check=True)
+    # Start docker-compose with test config (uses port 8099 to avoid conflicts)
+    subprocess.run([
+        "docker-compose", "-f", "docker-compose.test.yml", "-p", "ffmpeg-worker-test",
+        "up", "-d", "--build"
+    ], check=True)
 
     # Wait for service to be ready
     for _ in range(30):
@@ -47,7 +50,10 @@ def docker_compose():
     yield
 
     # Cleanup
-    subprocess.run(["docker-compose", "down"], check=True)
+    subprocess.run([
+        "docker-compose", "-f", "docker-compose.test.yml", "-p", "ffmpeg-worker-test",
+        "down"
+    ], check=True)
 
 
 def test_full_workflow(docker_compose):