fix(async): convert PoA proposer methods to async and update coordinator dependencies

- Convert _propose_block, _ensure_genesis_block to async methods in PoAProposer
- Add await to gossip_broker.publish calls in block broadcasting
- Add await to _ensure_genesis_block and _propose_block method calls
- Update coordinator-api Python version constraint to >=3.13,<3.15
- Add torch ^2.10.0 dependency to coordinator-api
- Add make_asgi_app import to prometheus_client in main.py
- Export new routers: global

fix_gossip3.patch

@@ -0,0 +1,11 @@
+--- a/apps/blockchain-node/src/aitbc_chain/consensus/poa.py
++++ b/apps/blockchain-node/src/aitbc_chain/consensus/poa.py
+@@ -101,7 +101,7 @@
+                 # Wait for interval before proposing next block
+                 await asyncio.sleep(self.config.interval_seconds)
+                 
+-                self._propose_block()
++                await self._propose_block()
+                 
+         except asyncio.CancelledError:
+             pass