fix: proto descriptor collision and PyPI wheel packaging (#11)

* fix: eager proto registration to avoid descriptor pool collision

When both capiscio-sdk and capiscio-mcp are co-installed, the second
proto import crashes with DescriptorPoolConflict.

Fix:
- Eager import of mcp_pb2 in __init__.py to win the registration race
- Add try/except around AddSerializedFile with FindFileByName fallback

* fix: address review — harden proto collision except clause with message check and schema validation

Author: beonde

capiscio_mcp/__init__.py

@@ -69,6 +69,12 @@ async def read_database(query: str) -> list[dict]:
     ServerErrorCode,
     TrustLevel,
 )
+
+# Eagerly register MCP proto descriptor before capiscio-sdk can register its
+# simpler version.  The MCP proto is a superset (has PolicyDecision* etc.), so
+# the SDK can safely fall back to it when it detects a duplicate.
+import capiscio_mcp._proto.gen.capiscio.v1.mcp_pb2 as _mcp_pb2  # noqa: F401, E402
+
 from capiscio_mcp.errors import (
     GuardError,
     ServerVerifyError,

capiscio_mcp/_proto/gen/capiscio/v1/mcp_pb2.py

@@ -61,6 +61,12 @@ Issues = "https://github.com/capiscio/capiscio-mcp-python/issues"
 [tool.hatch.build.targets.wheel]
 packages = ["capiscio_mcp"]
 
+[tool.hatch.build.targets.wheel.force-include]
+"capiscio_mcp/_proto/gen/capiscio" = "capiscio_mcp/_proto/gen/capiscio"
+
+[tool.hatch.build.targets.sdist.force-include]
+"capiscio_mcp/_proto/gen/capiscio" = "capiscio_mcp/_proto/gen/capiscio"
+
 [tool.pytest.ini_options]
 asyncio_mode = "auto"
 testpaths = ["tests"]