fix: preserve retained exit ordering after parent recreation

[luisleo526]

Summary

• preserve TradingView path ordering when a flat retained bracket child survives cancellation of its stop parent and the same parent is recreated in the same evaluation
• correlate the exact cancelled parent, surviving child, fresh parent, and child replacement incarnations before changing fill scan order
• keep legacy behavior outside this narrow path and expose a metadata opt-out for differential validation
• add positive, negative, scope, lifecycle, and strict-ordering regression panels

Validation

• focused regression binary: 364 passed, 0 failed
• CTest: 110 passed, 0 failed
• codegen pytest: 1599 passed, 2 skipped
• compiled corpus: 252/252 completed; all 254 trade artifacts byte-identical to public base outside the target
• five-strategy cohort: Vasudev 782/779 Strong to 779/779 Excellent; four controls byte-identical
• full 412-strategy gate: 347 Excellent / 47 Strong / 3 Moderate / 5 Weak plus 8 excluded; exactly one upgrade and zero downgrades
• N=1 exhaustive publication matrix: default Excellent with cAbs=0; opt-out restores Strong with cAbs=3
• final candidate tree: 173e00061f8b568e56a846fd8f2d74cea1f52e24
• final patch SHA-256: 35496ad967e0a4030a1a6739a105126027ef70c9d8fc0e99c335bdd7fdee7e7f

Compatibility

The reorder requires the exact flat-born two-order POOC lifecycle signature and leaves COOF, magnifier, realtime warmup, OCA, trailing, partial, after-close, activation, and unrelated replacement paths unchanged.