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/NextHopRouter.cpp

@@ -1,4 +1,5 @@
 #include "NextHopRouter.h"
+#include "NodeDB.h"
 
 NextHopRouter::NextHopRouter() {}
 
@@ -108,7 +109,13 @@ bool NextHopRouter::perhapsRelay(const meshtastic_MeshPacket *p)
                 meshtastic_MeshPacket *tosend = packetPool.allocCopy(*p); // keep a copy because we will be sending it
                 LOG_INFO("Relaying received message coming from %x", p->relay_node);
 
-                tosend->hop_limit--; // bump down the hop count
+                // Use shared logic to determine if hop_limit should be decremented
+                if (shouldDecrementHopLimit(p)) {
+                    tosend->hop_limit--; // bump down the hop count
+                } else {
+                    LOG_INFO("Router/CLIENT_BASE-to-favorite-router/CLIENT_BASE relay: preserving hop_limit");
+                }
+
                 NextHopRouter::send(tosend);
 
                 return true;