[EPIC][scorecard] Raise official compatibility scorecard from v0.1.2 baseline

[midagedev]

Context

Current documented scorecard baseline is from v0.1.1 and does not reflect command/transaction support added on main and released as v0.1.2.

Goal

Increase official-suite compatibility scorecard quality by reducing unsupported reasons and increasing imported differential coverage while keeping mismatch/error at zero.

Baseline (2026-02-24, documented)

• imported: 146
• unsupported: 868
• mismatch: 0
• error: 0

Success Criteria

• Scorecard is regenerated on v0.1.2+ evidence and published.
• Imported differential coverage increases from baseline.
• Unsupported reason counts for targeted operations decrease materially.
• Mismatch/error remain at zero for imported cases.

Child Issues

• [scorecard][baseline] Re-run official suite and publish v0.1.2 compatibility baseline #99
• [scorecard][utf] Support transaction operation adapters in unified runner #100
• [scorecard][utf] Wire unified CRUD operations to v0.1.2 command support #101
• [scorecard][utf] Implement createEntities subset used by official suites #102
• [scorecard][policy] Define and implement failPoint handling strategy for unified specs #103
• [scorecard][aggregation] Reduce unsupported aggregate-stage reasons from failure ledger #104

Priority Order

1. [scorecard][baseline] Re-run official suite and publish v0.1.2 compatibility baseline #99 Rebaseline and freeze target gaps.
2. [scorecard][utf] Support transaction operation adapters in unified runner #100 + [scorecard][utf] Wire unified CRUD operations to v0.1.2 command support #101 Expand UTF operation adapters for already-implemented commands.
3. [scorecard][utf] Implement createEntities subset used by official suites #102 + [scorecard][aggregation] Reduce unsupported aggregate-stage reasons from failure ledger #104 Reduce remaining unsupported reasons (createEntities, aggregation-stage gaps).
4. [scorecard][policy] Define and implement failPoint handling strategy for unified specs #103 Define and apply failPoint policy after baseline classification.

[midagedev]

Post-merge progress snapshot (PR #105, merged):\n\nBaseline reference (Official Suite Sharded run 22339640229):\n- imported=200\n- unsupported=814\n- mismatch=54\n- error=0\n\nLocal rerun after merge (r3FailureLedger against pinned mongodb/specifications checkout):\n- imported=480\n- unsupported=526\n- mismatch=84\n- error=0\n\nDelta vs baseline:\n- imported: +280\n- unsupported: -288\n- mismatch: +30\n\nCurrent mismatch concentration:\n- bulkWrite: 60 cases\n- txn lifecycle/retry edge cases (mostly insert-led scenarios): 16 cases\n- create-null-ids / replaceOne-validation: 8 cases\n\nInterpretation:\n- #99 and #103 are now resolved (baseline/documentation refresh + explicit failPoint policy path).\n- #100/#101/#102 moved forward materially (coverage/imported increased; unsupported reduced), but remain open due mismatch debt above.\n- #104 remains open (aggregate-stage unsupported reduction not yet addressed in this PR).

[midagedev]

Progress update on the epic:

Current R3 result on main:

• failureCount=0 (build/reports/r3-failure-ledger-local/r3-failure-ledger.json)
• suites: crud-unified 298/0/0, transactions-unified 162/0/0, sessions 20/0/0 (imported/mismatch/error)

Child status:

• #100 closed
• #101 closed
• #104 remains open (aggregate-stage unsupported reduction)

Remaining work for this epic is concentrated in unsupported reduction policy/coverage (primarily aggregation-stage and policy-excluded operations), not mismatch parity.

[midagedev]

추가 호환성 백로그(테스트 백엔드 사용성 관점):

• [compat][utf] Add runCommand operation adapter for official suite coverage #229 [compat][utf] Add runCommand operation adapter for official suite coverage
• [compat][utf] Support clientBulkWrite operation in importer and differential backend #231 [compat][utf] Support clientBulkWrite operation in importer and differential backend
• [compat][update] Implement arrayFilters subset end-to-end (importer+runtime+engine) #232 [compat][update] Implement arrayFilters subset end-to-end (importer+runtime+engine)
• [compat][update] Support update pipeline form (u as array) with deterministic subset #233 [compat][update] Support update pipeline form (u as array) with deterministic subset
• [compat][utf] Add profile-based failPoint/targetedFailPoint handling #234 [compat][utf] Add profile-based failPoint/targetedFailPoint handling
• [compat][collation] Implement collation semantic subset for query/sort/distinct/index #235 [compat][collation] Implement collation semantic subset for query/sort/distinct/index
• [compat][txn] Expand advanced retryable transaction semantics for test-backend usage #236 [compat][txn] Expand advanced retryable transaction semantics for test-backend usage

위 항목은 docs/COMPATIBILITY.md, docs/COMPATIBILITY_SCORECARD.md, docs/SUPPORT_MATRIX.md 및 importer/runtime 코드 경로 기반으로 도출했습니다.
중복 최소화를 위해 현재 open issue와 겹치는 항목(#104 aggregation stage broad gap)은 제외했습니다.