Fix datetime parsing, missing table/column handling and type validation issues

[faithmry]

Summary

This PR fixes 11 bugs across multiple artifacts that were causing runtime errors during iOS forensic data extraction. The fixes address datetime parsing issues, missing table/column handling, and type validation problems.

Bugs Fixed

Datetime/ISO Format Issues (6 bugs)

1. bluetoothPairedReg - Fixed NameError: name 'UTC' is not defined

   • Changed import and function call from convert_unix_ts_to_str to convert_unix_ts_to_utc

2. alarms - Fixed ValueError: Invalid isoformat string with 'Z' suffix

   • Modified convert_plist_date_to_utc() in ilapfuncs.py (line 1160)
   • Removed 'Z' suffix from datetime format string

3. dhcpLeases - Fixed ValueError: Invalid isoformat string with 'Z' suffix

   • Modified convert_plist_date_to_timezone_offset() in ilapfuncs.py (line 1149)
   • Removed 'Z' suffix from datetime format string

4-5. keyboardAppUsage & appleWifiKnownNetworksTimes - Fixed by change in ilapfuncs.py.

Type Validation Issues (2 bugs)

6. user_defaults - Fixed AttributeError: 'str' object has no attribute 'items'

   • Added isinstance(plist, dict) check before calling .items()
   • Prevents error when plist is 'INVALID FILE' string

7. system_version_plist - Fixed TypeError: expected str, bytes or os.PathLike object, not function

   • Changed variable assignment from function name to actual file path
   • data_source = system_version_plist → data_source = plist_file

Database Schema Issues (4 bugs)

8. photosDbexif - Fixed OperationalError: no such table: ZASSET

   • Added table existence check before querying
   • Gracefully skips databases without ZASSET table

9. parseCDCache - Fixed OperationalError: no such column: score

   • Added column existence check using PRAGMA
   • Handles both iOS 13.4.1 and newer schema versions

10. trustedPeers - Fixed OperationalError: no such table: ZESCROWCLIENTMETADATA

    • Added table existence check before querying
    • Returns early if table doesn't exist

11. sysdiagnose - Fixed AttributeError: 'Context' has no attribute 'get_model_name'

    • Changed to correct method name: get_device_model()