Narrow exception handling in load_yaml_file

Replace the broad except Exception with specific catches for
yaml.YAMLError, AnsibleError (vault decryption), and OSError
(file I/O). Unexpected exceptions now propagate to the caller,
which is the Pythonic convention -- all callers already have their
own except Exception safety nets with context-appropriate messages.

AI-assisted: Claude Code
Signed-off-by: Roger Luethi <luethi@osism.tech>

Author: ideaship

osism/tasks/conductor/utils.py

@@ -3,6 +3,7 @@
 import os
 
 from ansible import constants as ansible_constants
+from ansible.errors import AnsibleError
 from ansible.parsing.vault import VaultLib, VaultSecret
 from loguru import logger
 
@@ -112,8 +113,11 @@ def load_yaml_file(path):
     except yaml.YAMLError as exc:
         logger.debug(f"Failed to parse YAML file {path}: {exc}")
         return None
-    except Exception as exc:
-        logger.debug(f"Failed to load YAML file {path}: {exc}")
+    except AnsibleError as exc:
+        logger.debug(f"Failed to decrypt YAML file {path}: {exc}")
+        return None
+    except OSError as exc:
+        logger.debug(f"Failed to read YAML file {path}: {exc}")
         return None