[nightshift] Narrow bare except Exception in fray FileQueue (#3618)

> *Seed scattered wide—*
> *bare catches swallow the bugs,*
> *narrowed, light breaks through.*


- **`file.py`**: Replaced two bare `except Exception:` blocks with
`except OSError:` in `FileQueue.pop()` and
`FileQueue._recover_expired_leases()`. The broad catches silently
swallowed programming errors (TypeError, ValueError, etc.) that should
propagate—only filesystem errors (OSError and subclasses like
FileNotFoundError) are expected here.
- **`http.py`**: Moved `import socket` from inside `get_client_host()`
to module level. It's a stdlib import, not an optional dependency guard,
so it belongs at the top per coding standards §1.1.

Both issues are explicitly flagged as deprecated patterns in
`docs/dev-guide/coding-standards.md` §8.2.

Author: github-actions[bot]

lib/fray/src/fray/v1/queue/file.py

@@ -81,7 +81,7 @@ def pop(self, lease_timeout: float = 60.0) -> Lease[T] | None:
         try:
             files = sorted(self.fs.ls(str(self.pending_dir), detail=False))
             files = [f for f in files if f.rstrip("/") != str(self.pending_dir).rstrip("/")]
-        except Exception:
+        except OSError:
             return None
 
         for file_path in files:
@@ -106,7 +106,7 @@ def _recover_expired_leases(self) -> None:
         """Check processing directory for expired leases and move them back to pending."""
         try:
             files = self.fs.ls(str(self.processing_dir), detail=False)
-        except Exception:
+        except OSError:
             return
 
         now = time.time()

lib/fray/src/fray/v1/queue/http.py

@@ -7,6 +7,7 @@
 
 import logging
 import pickle
+import socket
 import threading
 import time
 from typing import Any
@@ -115,8 +116,6 @@ def get_client_host(self) -> str:
         Returns the actual IP address using default route.
         """
         if self.host == "0.0.0.0":
-            import socket
-
             # Get the IP address that clients should use by checking default route
             try:
                 s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)