G6: N01+N02+N03 — add reader branches for CONTACT_DELETED, CONTACTS_FULL, TUNING_PARAMS

Why: Three firmware push/response codes had no SDK handler — frames fell
through to the "Unhandled" debug log. CONTACT_DELETED (0x8F) carries a
32-byte pubkey from onContactOverwrite(); CONTACTS_FULL (0x90) is a
1-byte push from onContactsFull(); TUNING_PARAMS (23) is the 9-byte
response to CMD_GET_TUNING_PARAMS carrying rx_delay and airtime_factor.
All three now dispatch typed events. Short frames are guarded.

Refs: Forensics report findings N01, N02, N03

src/meshcore/events.py

@@ -49,6 +49,9 @@ class EventType(Enum):
     PATH_RESPONSE = "path_response"
     PRIVATE_KEY = "private_key"
     DISABLED = "disabled"
+    CONTACT_DELETED = "contact_deleted"
+    CONTACTS_FULL = "contacts_full"
+    TUNING_PARAMS = "tuning_params"
     CONTROL_DATA = "control_data"
     DISCOVER_RESPONSE = "discover_response"
     NEIGHBOURS_RESPONSE = "neighbours_response"

src/meshcore/reader.py

@@ -916,6 +916,37 @@ class MessageReader:
                     Event(EventType.DISCOVER_RESPONSE, ndr, attributes)
                 )
 
+        elif packet_type_value == PacketType.CONTACT_DELETED.value:
+            # N01: PUSH_CODE_CONTACT_DELETED (0x8F) — 1-byte code + 32-byte pubkey
+            # Emitted by MyMesh::onContactOverwrite() (MyMesh.cpp:325-334)
+            if len(data) < 33:
+                logger.debug("CONTACT_DELETED frame too short (%d bytes, need 33)", len(data))
+                return
+            pubkey = data[1:33].hex()
+            await self.dispatcher.dispatch(
+                Event(EventType.CONTACT_DELETED, {"pubkey": pubkey}, {"pubkey": pubkey})
+            )
+
+        elif packet_type_value == PacketType.CONTACTS_FULL.value:
+            # N02: PUSH_CODE_CONTACTS_FULL (0x90) — 1-byte push, no payload
+            # Emitted by MyMesh::onContactsFull() (MyMesh.cpp:336)
+            await self.dispatcher.dispatch(Event(EventType.CONTACTS_FULL, {}))
+
+        elif packet_type_value == PacketType.TUNING_PARAMS.value:
+            # N03: RESP_CODE_TUNING_PARAMS (23) — response to CMD_GET_TUNING_PARAMS (43)
+            # Format: 1-byte code + 4-byte rx_delay (LE) + 4-byte airtime_factor (LE) = 9 bytes
+            # Emitted by MyMesh.cpp:1307-1313
+            if len(data) < 9:
+                logger.debug("TUNING_PARAMS frame too short (%d bytes, need 9)", len(data))
+                await self.dispatcher.dispatch(
+                    Event(EventType.ERROR, {"reason": "invalid_frame_length"})
+                )
+                return
+            rx_delay = int.from_bytes(data[1:5], byteorder="little")
+            airtime_factor = int.from_bytes(data[5:9], byteorder="little")
+            res = {"rx_delay": rx_delay, "airtime_factor": airtime_factor}
+            await self.dispatcher.dispatch(Event(EventType.TUNING_PARAMS, res))
+
         else:
             logger.debug(f"Unhandled data received {data}")
             logger.debug(f"Unhandled packet type: {packet_type_value}")