Followup track to post_module_taxonomy_de_cruft_20260627 (shipped
d74b9822). The 1 remaining test failure in tier-3-live_gui is
test_mma_concurrent_tracks_execution. Three of the four stacked root
causes were already fixed in commit 635ca552 (partial fix in the
prior session):
1. flat.setdefault(...)[...] = ... on frozen ProjectContext (3 sites)
2. t_data['id'] on Ticket objects (1 site)
3. mock_concurrent_mma.py --resume handling
The fourth root cause (2nd track's _start_track_logic never fires)
remains unresolved. This track instruments _start_track_logic_result
with stderr diagnostics, runs the test in isolation, identifies the
failure mode, and fixes it.
Per user directive: 'those issues must get resolved we are not
sweeping them under the rug'. Per workflow.md §Tier 1 Track
Initialization Rules: scope is 1 production file + 1 test mock +
1 report update; 4-6 atomic commits total; no day estimates.
ed
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