feat(testkit): expand UTF adapter coverage and real-mongod parity path

[midagedev]

Summary

• extend UnifiedSpecImporter with stateful UTF conversion context (collection/session entities, transaction lifecycle adapters, and session envelope injection)
• add UTF CRUD adapter mappings for countDocuments, replaceOne, findOneAndUpdate, findOneAndReplace
• define explicit failPoint policy path (unsupported-by-policy) and refresh compatibility scorecard baseline docs
• translate pseudo commands for real mongod execution (countDocuments / replaceOne / findOneAnd*) and support multi-session execution in RealMongodBackend
• normalize differential comparison for ephemeral cursor.id

Validation

• ./.tooling/gradle-8.10.2/bin/gradle --no-daemon test
• local ledger rerun with pinned specs via r3FailureLedger (replica-set local)

Local ledger snapshot after this change:

• imported: 480
• unsupported: 526
• mismatch: 84
• error: 0

Reference baseline from run 22339640229:

• imported: 200
• unsupported: 814
• mismatch: 54
• error: 0

Issue linkage

• Closes [scorecard][baseline] Re-run official suite and publish v0.1.2 compatibility baseline #99
• Closes [scorecard][policy] Define and implement failPoint handling strategy for unified specs #103
• Progress on [scorecard][utf] Support transaction operation adapters in unified runner #100
• Progress on [scorecard][utf] Wire unified CRUD operations to v0.1.2 command support #101
• Progress on [scorecard][utf] Implement createEntities subset used by official suites #102
• Progress on [scorecard][aggregation] Reduce unsupported aggregate-stage reasons from failure ledger #104
• Part of [EPIC][scorecard] Raise official compatibility scorecard from v0.1.2 baseline #98