Fix: Add missing tunnel registration for BLEPeerInterface

Problem:
- BLEPeerInterface was spawning but never calling owner.tunnel(self)
- Result: 0 tunnel table entries, no data transmission
- Peer interfaces showed as "reachable" but Transport couldn't route through them

Solution:
- Added owner.tunnel(peer_if) call after interface creation
- Applied to both spawn locations (central and peripheral connections)
- Pattern matches Android implementation in android_ble_interface.py

Changes:
- Line 1599-1601: Added tunnel registration for central connections
- Line 1770-1772: Added tunnel registration for peripheral connections

Testing:
- Peer interfaces now appear in rnstatus output
- BLEPeerInterface[RNS-Pi2/central] visible and marked as "reachable"
- AttributeError logged during tunnel() but interface still spawns
- Further investigation needed for data transmission

References:
- BLE_DATA_ROUTING_ISSUE.md - Root cause analysis
- BLE_SESSION_2025_10_31_PROGRESS.md - Detailed session notes
- android_ble_interface.py:403 - Reference implementation

🤖 Generated with Claude Code (https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/RNS/Interfaces/BLEInterface.py

@@ -1595,6 +1595,11 @@ class BLEInterface(Interface):
 
         # Register with transport
         RNS.Transport.interfaces.append(peer_if)
+
+        # Register as tunnel for routing
+        if hasattr(self, 'owner') and self.owner:
+            self.owner.tunnel(peer_if)
+
         self.spawned_interfaces[conn_id] = peer_if
 
         RNS.log(f"{self} spawned peer interface for {name} ({address}) via {connection_type}", RNS.LOG_DEBUG)
@@ -1761,6 +1766,11 @@ class BLEInterface(Interface):
 
         # Register with transport
         RNS.Transport.interfaces.append(peer_if)
+
+        # Register as tunnel for routing
+        if hasattr(self, 'owner') and self.owner:
+            self.owner.tunnel(peer_if)
+
         self.spawned_interfaces[conn_id] = peer_if
 
         # Create fragmenter using negotiated MTU from GATT server (if available)