fix(events): ignore non-UTF-8 event overrides (#3897)

Assisted-by: GitHub Copilot (model: GPT-5.6 Sol, autonomous)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/specify_cli/events.py

@@ -737,8 +737,10 @@ def resolve_events(
     if override_file.exists():
         try:
             override = yaml.safe_load(override_file.read_text(encoding="utf-8")) or {}
-        except yaml.YAMLError:
-            logger.warning("Could not parse %s; ignoring override", override_file)
+        except (OSError, UnicodeError, yaml.YAMLError):
+            logger.warning(
+                "Could not read or parse %s; ignoring override", override_file
+            )
             override = {}
         integrations = override.get("integrations", {}) if isinstance(override, dict) else {}
         if isinstance(integrations, dict) and integration_key in integrations: