fix(studio): harden release deployment pipeline

[evanlowe]

Summary

• run the Studio dependency manifest generator as a module so cloned source imports resolve correctly
• paginate VeFaaS Function discovery before updating an existing release service
• allow enough time for large Function bundles to upload on slower connections
• add regression coverage for manifest invocation, pagination, and upload timeout behavior

Testing

• uv run --group dev pre-commit run --files frontend/service/studio_release_server/builder.py frontend/service/studio_release_server/deploy.py veadk/integrations/ve_faas/ve_faas.py tests/test_cloud.py tests/test_studio_release_server.py
• uv run --group dev pytest tests/test_studio_release_server.py tests/test_cloud.py -q (40 passed)