fix: Add SentryTestUtilsTests to file-filters and create rule to prevent future issues

[philprime]

Description

This PR fixes the file-filters.yml configuration by adding the missing SentryTestUtilsTests/** directory pattern to ensure changes to test utility tests trigger the unit test CI workflow.

Additionally, it introduces a new Cursor rule (.cursor/rules/file-filters.mdc) to prevent similar issues in the future by providing comprehensive guidelines for maintaining the file-filters.yml configuration.

Changes

• ✅ Added SentryTestUtilsTests/** to run_unit_tests_for_prs filter
• ✅ Created .cursor/rules/file-filters.mdc with detailed guidelines for file-filters maintenance
• ✅ Includes verification checklist for PRs affecting project structure
• ✅ Provides bash commands for detecting missing filter patterns

Related

Fixes an issue from PR #6639 where the new SentryTestUtilsTests/ directory was not included in the file-filters configuration.

#skip-changelog

[github-actions]

🚨 Detected changes in high risk code 🚨

High-risk code can easily blow up and is hard to test. We had severe bugs in the past. Be extra careful when changing these files, and have an extra careful look at these:

• .github/file-filters.yml

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.163%. Comparing base (a4e1541) to head (7319124).
⚠️ Report is 7 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #6652       +/-   ##
=============================================
+ Coverage   84.960%   85.163%   +0.202%     
=============================================
  Files          452       452               
  Lines        27668     27668               
  Branches     12115     12117        +2     
=============================================
+ Hits         23507     23563       +56     
+ Misses        4113      4059       -54     
+ Partials        48        46        -2     

see 12 files with indirect coverage changes

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1223.09 ms	1257.60 ms	34.51 ms
Size	23.75 KiB	1023.81 KiB	1000.07 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
7f4bf81	1241.73 ms	1270.66 ms	28.93 ms
afaa522	1234.71 ms	1256.19 ms	21.48 ms
0b6776b	1230.18 ms	1262.06 ms	31.88 ms
c6c1cb7	1235.71 ms	1263.80 ms	28.08 ms
4e3915a	1230.02 ms	1258.90 ms	28.88 ms
d72784d	1214.31 ms	1241.35 ms	27.04 ms
37238de	1236.00 ms	1267.80 ms	31.80 ms
dad68ad	1229.15 ms	1261.98 ms	32.83 ms
5ae9ff1	1222.31 ms	1250.96 ms	28.65 ms
b115f82	1212.96 ms	1251.92 ms	38.96 ms

App size

Revision	Plain	With Sentry	Diff
7f4bf81	23.75 KiB	919.70 KiB	895.95 KiB
afaa522	23.74 KiB	996.91 KiB	973.17 KiB
0b6776b	23.75 KiB	968.23 KiB	944.49 KiB
c6c1cb7	23.75 KiB	928.15 KiB	904.40 KiB
4e3915a	23.75 KiB	858.69 KiB	834.94 KiB
d72784d	23.75 KiB	988.01 KiB	964.27 KiB
37238de	23.75 KiB	963.18 KiB	939.43 KiB
dad68ad	23.75 KiB	912.37 KiB	888.63 KiB
5ae9ff1	23.74 KiB	971.82 KiB	948.08 KiB
b115f82	23.75 KiB	989.04 KiB	965.30 KiB

Previous results on branch: philprime/fix-file-filter

Startup times

Revision	Plain	With Sentry	Diff
2199928	1190.77 ms	1227.24 ms	36.47 ms
c612239	1222.40 ms	1249.56 ms	27.17 ms

App size

Revision	Plain	With Sentry	Diff
2199928	23.75 KiB	1.00 MiB	1005.08 KiB
c612239	23.75 KiB	1.01 MiB	1006.48 KiB

[philipphofmann]

LGTM