fix: resolve python 3.14 syntax warnings and update deps

- Move return statements out of finally blocks in axon.py and dendrite.py
  (SyntaxWarning: 'return' in a 'finally' block is deprecated in 3.14,
   will be an error in 3.16)
- Relax aiohttp constraint from ~=3.9 to >=3.9,<4.0

Author: Arthurdw

bittensor/core/axon.py

@@ -1207,8 +1207,8 @@ async def dispatch(
                     f"axon     | --> | {response.headers.get('content-length', -1)} B | {synapse.name} | None | None | 200 | Success "
                 )
 
-            # Return the response to the requester.
-            return response
+        # Return the response to the requester.
+        return response
 
     async def preprocess(self, request: "Request") -> "Synapse":
         """

bittensor/core/dendrite.py

@@ -389,7 +389,8 @@ def query(
             use_new_loop = True
         finally:
             self.close_session(using_new_loop=use_new_loop)
-            return result  # type: ignore
+
+        return result  # type: ignore
 
     async def forward(
         self,
@@ -597,8 +598,8 @@ async def call(
             # Log synapse event history
             self.synapse_history.append(Synapse.from_headers(synapse.to_headers()))
 
-            # Return the updated synapse object after deserializing if requested
-            return synapse.deserialize() if deserialize else synapse
+        # Return the updated synapse object after deserializing if requested
+        return synapse.deserialize() if deserialize else synapse
 
     async def call_stream(
         self,

pyproject.toml

@@ -15,7 +15,7 @@ requires-python = ">=3.10,<3.15"
 dependencies = [
     "wheel",
     "setuptools~=70.0",
-    "aiohttp~=3.9",
+    "aiohttp>=3.9,<4.0",
     "asyncstdlib~=3.13.0",
     "colorama~=0.4.6",
     "fastapi>=0.110.1",
@@ -29,7 +29,7 @@ dependencies = [
     "pyyaml>=6.0",
     "retry==0.9.2",
     "requests>=2.0.0,<3.0",
-    "pydantic>=2.3, <3",
+    "pydantic>=2.3,<3",
     "scalecodec==1.2.12",
     "uvicorn",
     "bittensor-drand>=1.0.0,<2.0.0",