libtmux(fix[logging]): remove exc_info from catch-log-reraise

why: exc_info=True duplicates the traceback when followed by raise.
The extra={"tmux_cmd": ...} satisfies the AGENTS.md carve-out for
adding context that would otherwise be lost.
what:
- Remove exc_info=True from logger.error in tmux_cmd.__init__
- Add noqa: TRY400 since error() without exc_info in except is intentional

Author: tony

src/libtmux/common.py

@@ -270,9 +270,8 @@ def __init__(self, *args: t.Any) -> None:
             stdout, stderr = self.process.communicate()
             returncode = self.process.returncode
         except Exception:
-            logger.error(
+            logger.error(  # noqa: TRY400
                 "tmux subprocess failed",
-                exc_info=True,
                 extra={
                     "tmux_cmd": subprocess.list2cmdline(cmd),
                 },