Uninstall does not clear data from a custom data directory on macOS

[chyujing]

Description

After changing the data directory configuration, clicking 'uninstall' does not delete the data files from the corresponding custom directory. The data persists after the uninstall operation.

Steps to Reproduce

1. Change the configuration file to point to a custom data directory.
2. Restart the service.
3. Click 'uninstall'.
4. Observe that the contents of the custom data directory remain.

Environment

• Platform: macOS
• Version Information: Not provided. Please include the output of bin/observer -V. If the test involves obproxy, also include obproxy -V.
• Is this an RD-provided temporary version?: No
• Reproducibility: Consistently reproducible (必现)
• Test Changes: Not specified
• Other Environmental Anomalies/Changes: No

Additional Context

• Environmental Details: Not provided. Please provide connection strings for the problematic tenant and the sys tenant, as well as deployment information. Indicate if the environment has been preserved.
• Log Information: Not provided.
• Note on Issue Classification: For issues reported by external business stakeholders, please correctly select the "Work Item Type" based on the actual situation:
  • Customer Service Feedback: Refers to issues before production deployment or during POC, where a product bug is confirmed to require a fix and a new release.
  • Online Issue: An issue that occurs after production deployment, confirmed as a product bug, but not classified as a fault.
  • Online Fault: An issue that occurs after production deployment, confirmed as a product bug, causing business errors or impact on the customer side (the interpretation of a "fault" is at the discretion of the delivery service team).