[python] #359 relay connect timeout (10s) + v0.7.7

Why: RelayWorkerClient connected without an app-level timeout, so a
TCP-reachable-but-not-accepting relay could block ~75s+ on the OS default.
asyncio.wait_for(open_connection, 10s) fails fast; run() reconnects. Bundles the
iter-1504 mypy annotations (already on main). 213 tests pass; ruff clean.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: RobLe3

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "iicp-client"
-version = "0.7.5"
+version = "0.7.7"
 description = "Official Python client SDK for the IICP protocol"
 readme = "README.md"
 license = {text = "Apache-2.0"}

src/iicp_client/__init__.py

@@ -49,7 +49,7 @@
     TaskResponse,
 )
 
-__version__ = "0.7.5"
+__version__ = "0.7.7"
 __all__ = [
     "IicpClient",
     "IicpError",

src/iicp_client/relay_worker_client.py

@@ -43,6 +43,10 @@
 _HEADER_STRUCT = struct.Struct("!4sBBBBI")
 _PING_INTERVAL_S = 30.0
 _MAX_RECONNECT_DELAY_S = 60.0
+# #359 — explicit connect timeout so a TCP-reachable-but-not-accepting relay
+# (firewall RST after delay, port scan) fails fast instead of blocking on the
+# OS default (~75s+). The run() loop catches the TimeoutError and reconnects.
+_CONNECT_TIMEOUT_S = 10.0
 
 # Frame type constants (mirrors MsgType in iicp_tcp.py)
 _MT_INIT = 0x01
@@ -161,7 +165,10 @@ async def run(self) -> None:
             delay = min(delay * 2, _MAX_RECONNECT_DELAY_S)
 
     async def _session(self) -> None:
-        reader, writer = await asyncio.open_connection(self._relay_host, self._relay_port)
+        reader, writer = await asyncio.wait_for(
+            asyncio.open_connection(self._relay_host, self._relay_port),
+            timeout=_CONNECT_TIMEOUT_S,
+        )
         logger.debug(
             "Relay worker %s: connected to %s:%d",
             self._worker_id, self._relay_host, self._relay_port,