feat(instrument): Per-callback try/except resilience wrapper across 10 lighter adapters (cross-poll #5)

src/layerlens/instrument/adapters/_base/__init__.py

@@ -0,0 +1,28 @@
+"""Shared base infrastructure for all instrument adapters.
+
+This package re-exports the public surface of the base adapter contract
+(``AdapterInfo``, ``BaseAdapter``) and the resilience helpers used by
+framework adapters to wrap callbacks in try/except boundaries so that
+observability code never breaks the user's framework.
+"""
+
+from __future__ import annotations
+
+from ._core import AdapterInfo, BaseAdapter
+from .resilience import (
+    DEFAULT_FAILURE_THRESHOLD,
+    HealthStatus,
+    ResilienceTracker,
+    get_default_for,
+    resilient_callback,
+)
+
+__all__ = [
+    "AdapterInfo",
+    "BaseAdapter",
+    "DEFAULT_FAILURE_THRESHOLD",
+    "HealthStatus",
+    "ResilienceTracker",
+    "get_default_for",
+    "resilient_callback",
+]