refactor: organize pilot packages

Group review, feedback, evaluation, observability, and entrypoint code into packages. Keep thin top-level compatibility shims for existing scripts and imports, and mirror the structure in the tests.

pilot/review_ports.py

@@ -1,17 +1,5 @@
-"""Stable interfaces shared by the review pipeline and its adapters."""
-from __future__ import annotations
-
-from typing import Protocol
-
-
-class Forge(Protocol):
-    def get(self, path: str, accept: str = "application/json") -> tuple[int, bytes]: ...
-    def post(self, path: str, body: dict) -> tuple[int, bytes]: ...
-
-
-class Reviewer(Protocol):
-    def review(self, system: str, user: str, max_tokens: int) -> str: ...
-
-
-class Telemetry(Protocol):
-    def emit(self, **event: object) -> None: ...
+"""Compatibility import for review ports."""
+import importlib
+import sys
+_module = importlib.import_module("review.ports")
+sys.modules[__name__] = _module