feat: entry.runtime_data ShieldConnectionManager lifecycle — passive when ADB unavailable, close on HA stop + unload; adb_session adapter docstring

custom_components/nvidia_shield/adb_session.py

@@ -1,7 +1,12 @@
-"""ADB media session reader for NVIDIA Shield.
+"""ADB session adapter for NVIDIA Shield.
 
-Thin wrapper around ha_adb_common.AdbClientBase — adds the Shield-specific
-`poll()` method that calls wake check + media session in sequence.
+Since Phase 1 this module is a thin adapter on top of ha_adb_common:
+
+- ``ensure_adb_key`` (re-exported here for the config flow / Pair ADB button)
+  does the one-time key-material setup — the pairing flow stays untouched.
+- ``AdbMediaSessionPoller`` remains the protocol-level ADB client used by the
+  ShieldConnectionManager (connection.py) and one-shot pairing connects. The
+  polling loop itself lives in the connection manager, not here.
 
 Re-exports MediaSessionInfo and ensure_adb_key for existing importers.
 """