Phase 29ah: JoinIR regression pack expansion (real-world coverage)
Goal: JoinIR の回帰パックを “最小 + 現実ログ系” に拡張し、見落としを減らす（仕様不変）。
P0: Add Pattern2 real-world case to regression pack
- 指示書:
docs/development/current/main/phases/phase-29ah/P0-REGRESSION-PACK-INCLUDES-PHASE263-PATTERN2-INSTRUCTIONS.md
Verification (SSOT)
cargo build --release./tools/smokes/v2/run.sh --profile quick./tools/smokes/v2/profiles/integration/joinir/phase29ae_regression_pack_vm.sh