Feat/0-cost hops for favorite routers (#7992)

* feat: implement router hop preservation for router-to-router communication

- Preserve hop_limit when both local device and previous relay are routers/CLIENT_BASE
- Only preserve hops for favorite routers to prevent abuse
- Apply to both FloodingRouter and NextHopRouter
- Update hop counting logic in MeshService for router-to-router communication

This allows routers to communicate over longer distances without
consuming hop limits, improving mesh network efficiency for
infrastructure nodes.

* chore: update protobufs submodule to latest

* Optimized to check friend list first before nodedb.

* Reverting unintended changes

* revert: remove protobufs submodule update

This reverts the protobufs submodule back to a84657c22 to remove
unintended changes from this branch.

* Slight rewrite to remove flawed NO_RELAY_NODE logic and added logic to add isFirstHop. If isFirstHop, always decrease hop_limit to avoid retry logic.

* DRY code. Remove NodeInfo logic that was left over.

* Trunk formatting

src/mesh/Router.h

@@ -104,6 +104,18 @@ class Router : protected concurrency::OSThread, protected PacketHistory
      */
     virtual bool shouldFilterReceived(const meshtastic_MeshPacket *p) { return false; }
 
+    /**
+     * Determine if hop_limit should be decremented for a relay operation.
+     * Returns false (preserve hop_limit) only if all conditions are met:
+     * - It's NOT the first hop (first hop must always decrement)
+     * - Local device is a ROUTER, ROUTER_LATE, or CLIENT_BASE
+     * - Previous relay is a favorite ROUTER, ROUTER_LATE, or CLIENT_BASE
+     *
+     * @param p The packet being relayed
+     * @return true if hop_limit should be decremented, false to preserve it
+     */
+    bool shouldDecrementHopLimit(const meshtastic_MeshPacket *p);
+
     /**
      * Every (non duplicate) packet this node receives will be passed through this method.  This allows subclasses to
      * update routing tables etc... based on what we overhear (even for messages not destined to our node)