Normalize path separators in ContentManager

[MudDev]

This pull request introduces several improvements and bug fixes related to file path normalization, robust handling of missing or malformed data, and enhanced reliability when managing database file entries and user content directories. The changes ensure better cross-platform compatibility, prevent errors from unexpected input, and make the system more resilient to transient filesystem issues.

Path normalization and consistency:

• All file paths are now normalized to use forward slashes (/) instead of backslashes (`This pull request introduces several improvements and bug fixes related to file path normalization, robust handling of missing or malformed data, and enhanced reliability when managing database file entries and user content directories. The changes ensure better cross-platform compatibility, prevent errors from unexpected input, and make the system more resilient to transient filesystem issues.

Path normalization and consistency:

) in ContentManager.py, ensuring consistent handling across different operating systems.

Robust handling of missing or malformed data:

• Improved getJsonRow in DbCursor.py to handle cases where the directory string does not match the expected pattern, preventing errors when parsing site addresses and directories.

Database file management and resilience:

• Modified getDbFiles in SiteStorage.py to only drop stale content.db entries if the site directory is actually readable, preventing accidental removal of entries due to temporary filesystem issues.

User content directory detection:

• Enhanced downloadContent in Site.py to detect when user content directories need to be scanned for the first time, ensuring that peer queries are triggered as needed to discover user subdirectories.