fix: add server/app.py, update openenv.yaml app path and pyproject.toml scripts

openenv.yaml

@@ -2,5 +2,5 @@ spec_version: 1
 name: customer-support-api
 type: space
 runtime: fastapi
-app: api:app
+app: server.app:app
 port: 7860

pyproject.toml

@@ -22,8 +22,8 @@ dev = [
 ]
 
 [project.scripts]
-server = "api:main"
+server = "server.app:main"
 
 [tool.setuptools.packages.find]
 where = ["."]
-include = ["tasks*", "graders*"]
+include = ["server*", "tasks*", "graders*"]

server/app.py

@@ -0,0 +1,5 @@
+"""
+server/app.py — Required by OpenEnv multi-mode deployment standard.
+Re-exports the FastAPI app and main entry point from the root api module.
+"""
+from api import app, main  # noqa: F401