fix(analyze): zero disk usage instead of apparent size for online-only files

[AdamMagued]

Fixes #688.

Problem

In #609, support was added to detect cloud "online-only" files (such as OneDrive placeholders) via Windows file attributes FILE_ATTRIBUTE_RECALL_ON_OPEN (0x100000) and FILE_ATTRIBUTE_RECALL_ON_DATA_ACCESS (0x400000). However, setPlatformSpecificAttrs set file.Size = 0 (apparent size) instead of zeroing file.Usage (disk usage), while keeping file.Usage = f.Size(). Consequently:

1. Online-only files were still reported with full allocated disk usage in default views, exports, and directory rollups.
2. The apparent size was cleared to 0 instead of retaining the logical length.
3. Auxiliary helpers getPlatformSpecificUsageAndMli and getSyscallStats did not account for recall flags when querying file usage.

Solution

• Updated setPlatformSpecificAttrs in pkg/analyze/dir_other.go to preserve file.Size and set file.Usage = 0 when isRecallFile evaluates to true.
• Updated getPlatformSpecificUsageAndMli and getSyscallStats to return usage = 0 for files matching recall attributes.
• Added unit tests in pkg/analyze/dir_other_test.go covering regular files, recall on open, recall on data access, combined attributes, and fallback behavior.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.74%. Comparing base (387cf50) to head (e67d225).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #692      +/-   ##
==========================================
+ Coverage   90.73%   90.74%   +0.01%     
==========================================
  Files          76       76              
  Lines        6843     6843              
==========================================
+ Hits         6209     6210       +1     
  Misses        633      633              
+ Partials        1        0       -1     

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