feat(CSI-342): get filesystem free space via API without requiring fs mount

[sergeyberezansky]

TL;DR

Added support for force-fresh filesystem capacity queries through the API

What changed?

• Added ForceFresh parameter to filesystem API calls to ensure accurate capacity reporting
• Implemented new getFilesystemFreeSpaceByApi method to query filesystem capacity directly through API
• Modified getFilesystemFreeSpace to prioritize API-based capacity queries when possible
• Added unit tests to verify both capacity query methods

How to test?

1. Run the new unit tests using:

go test -v ./pkg/wekafs -args \
  -api-endpoint=<your-endpoint> \
  -api-username=<username> \
  -api-password=<password> \
  -api-org=<org> \
  -fs-name=<filesystem-name>

2. Verify that both TestVolume_getFilesystemFreeSpaceByApi and TestVolume_getFilesystemFreeSpace pass
3. Confirm that filesystem capacity queries return accurate, non-zero values

Why make this change?

To improve the accuracy and efficiency of filesystem capacity reporting by leveraging direct API queries instead of requiring filesystem mounts. This provides more reliable capacity information and reduces operational overhead.

[sergeyberezansky]

• feat(CSI-342): get filesystem free space via API without requiring fs mount #476 👈 (View in Graphite)
• fix(CSI-350): avoid wekafs mounter from mounting if weka is not running #484
• dev

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[graphite-app]

Graphite Automations

"Request reviewers once CI passes" took an action on this PR • (03/10/25)

1 reviewer was added to this PR based on Sergey Berezansky's automation.

[sergeyberezansky]

Merge activity

• Mar 11, 6:01 AM EDT: A user started a stack merge that includes this pull request via Graphite.
• Mar 11, 7:52 AM EDT: Graphite couldn't merge this pull request because a downstack PR fix(CSI-343): panic on apiclient when endpoint list is empty #475 failed to merge.