fix(daemon): install signal handlers inside running event loop

_install_signal_handlers() was called before asyncio.run(), registering
handlers on a throwaway loop that asyncio.get_event_loop() created — so
SIGTERM would never reach the supervisor. Move the call into _run_daemon()
and switch to asyncio.get_running_loop() so handlers are registered on the
actual running loop.

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

src/pyra/daemon/core.py

@@ -144,6 +144,9 @@ def _make_ipc_handler(supervisor: PluginSupervisor):
 async def _run_daemon(cfg, supervisor: PluginSupervisor) -> None:
     from pyra.daemon.ipc import IpcServer, get_socket_path, is_unix_socket
 
+    # Install signal handlers now that the event loop is running.
+    _install_signal_handlers(supervisor)
+
     if is_unix_socket():
         address = get_socket_path(cfg.daemon.socket_path)
     else:
@@ -194,7 +197,6 @@ def run_foreground() -> None:
     _start_time = time.monotonic()
 
     with pid_file:
-        _install_signal_handlers(supervisor)
         _log.info("Pyra daemon starting (PID %d).", os.getpid())
         try:
             asyncio.run(_run_daemon(cfg, supervisor))
@@ -266,7 +268,7 @@ def _install_signal_handlers(supervisor: PluginSupervisor) -> None:
         signal.signal(signal.SIGTERM, lambda *_: supervisor.request_shutdown())
         return
 
-    loop = asyncio.get_event_loop()
+    loop = asyncio.get_running_loop()
     loop.add_signal_handler(signal.SIGTERM, supervisor.request_shutdown)
     loop.add_signal_handler(signal.SIGHUP, supervisor.request_shutdown)