fix: dev branch must skip past a pre-GA hotfix's reserved micro version (BERTE-609)

[charlesprost]

Summary

• A pre-GA hotfix branch (e.g. hotfix/10.0.0) permanently reserves its X.Y.Z version the moment it is cut: every version it can ever produce is X.Y.Z.<hfrev> (.0 pre-GA, .1+ post-GA), never a bare X.Y.Z. The parent dev branch (development/10.0) must therefore target X.Y.(Z+1), not X.Y.Z, or a later X.Y.Z tag cut from the dev branch would collide with the hotfix line while describing different code.
• _update_major_versions() already implements this rule for major-only dev branches (development/10 correctly skips past hotfix/10.0.0 to target 10.1.0), but the equivalent minor-branch path ignored phantom hotfix branches when computing latest_micro. This change folds phantom hotfix micros into that computation too, mirroring the existing major-only handling.
• Updated test_branch_cascade_2digit_with_pre_ga_hotfix to assert the corrected expectation (development/10.0 → 10.0.1, not 10.0.0) both pre- and post-GA, and added assertions on the hotfix's own version (10.0.0.0 → 10.0.0.1) to make the pairing explicit.

Ref: BERTE-609

Test plan

• test_branch_cascade_2digit_with_pre_ga_hotfix updated and passing
• Full QuickTest cascade/hotfix/phantom test class passing (29 tests)
• Verified unrelated TestQueueing/TaskQueueTests failures pre-exist on unmodified main (require the full mock-server CLI harness, not bare pytest)

🤖 Generated with Claude Code

[claude]

LGTM

The fix correctly mirrors the existing major-branch phantom hotfix handling (lines 1151-1157) for the minor-branch path. The micros.extend() ensures latest_micro accounts for hotfix-reserved versions even before GA tags land, and the if micros: guard remains safe. Test updates verify both pre-GA and post-GA scenarios with explicit version assertions.

Review by Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.00%. Comparing base (b35e425) to head (87f5075).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #277   +/-   ##
=======================================
  Coverage   90.00%   90.00%           
=======================================
  Files          81       81           
  Lines       11048    11051    +3     
=======================================
+ Hits         9944     9947    +3     
  Misses       1104     1104           

Flag	Coverage Δ
integration	87.76% <100.00%> (+<0.01%)	⬆️
tests	87.72% <100.00%> (+<0.01%)	⬆️
tests-BuildFailedTest	25.81% <0.00%> (-0.01%)	⬇️
tests-QuickTest	33.04% <100.00%> (+0.02%)	⬆️
tests-RepositoryTests	25.49% <0.00%> (-0.01%)	⬇️
tests-TaskQueueTests	49.47% <16.66%> (-0.01%)	⬇️
tests-TestBertE	66.96% <16.66%> (-0.02%)	⬇️
tests-TestQueueing	51.58% <16.66%> (-0.01%)	⬇️
tests-api-mock	14.72% <0.00%> (-0.01%)	⬇️
tests-noqueue	78.39% <100.00%> (+<0.01%)	⬆️
tests-noqueue-BuildFailedTest	25.81% <0.00%> (-0.01%)	⬇️
tests-noqueue-QuickTest	33.04% <100.00%> (+0.02%)	⬆️
tests-noqueue-RepositoryTests	25.49% <0.00%> (-0.01%)	⬇️
tests-noqueue-TaskQueueTests	49.47% <16.66%> (-0.01%)	⬇️
tests-noqueue-TestBertE	63.51% <16.66%> (-0.02%)	⬇️
tests-noqueue-TestQueueing	25.51% <0.00%> (-0.01%)	⬇️
tests-server	27.24% <0.00%> (-0.01%)	⬇️
unittests	42.32% <0.00%> (-0.02%)	⬇️
utests	27.68% <0.00%> (-0.01%)	⬇️

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[charlesprost]

Closed as a side effect of renaming the source branch to follow the bugfix/BERTE-609-... convention. Same commit, continued in #278.