fix: all imports → relative (from .xxx) — no stdlib site conflict

site/routes/__init__.py

@@ -2,12 +2,12 @@
 
 
 def register_routes(app):
-    from site.routes.upload_bp import upload_bp
-    from site.routes.pipeline_bp import pipeline_bp
-    from site.routes.api_bp import api_bp
-    from site.routes.prompts_bp import prompts_bp
-    from site.routes.health_bp import health_bp
-    from site.routes.pages_bp import pages_bp
+    from .routes.upload_bp import upload_bp
+    from .routes.pipeline_bp import pipeline_bp
+    from .routes.api_bp import api_bp
+    from .routes.prompts_bp import prompts_bp
+    from .routes.health_bp import health_bp
+    from .routes.pages_bp import pages_bp
 
     app.register_blueprint(upload_bp)
     app.register_blueprint(pipeline_bp)