[AGiorgetti]

Summary

Fixes #91.

• Guard cursor acquisition and each cursor batch in all nine synchronous enumerable read paths using the existing storage-exception translation.
• Preserve lazy streaming, ordering, repeated enumeration, and cursor disposal on completion, early termination, and failures.
• Keep document projection outside the driver guard so serializer exceptions retain their original identity, even if a serializer throws a MongoException.
• Retain the immediate disposed-engine guard and enforce it before deferred driver calls. Document exception/lifetime compatibility in the changelog.
• Keep async reads, public signatures, stored data, dependencies, CI, and MongoDB 4.2 minimum unchanged.

Validation

• Test-first commit c6b005ad: CI run 41856965260 passed Windows/Linux builds. Each of net8/net9/net10 reproduced exactly 54 expected failures: raw driver exceptions escaped instead of storage exceptions; 945 other tests passed, 0 skipped.
• Final fix: all 447 focused .NET 10 regression tests pass locally, 0 skipped.
• Full .NET 10 suite on MongoDB 4.2.25 and 7.0.45: 1,025 passed, 1 failed, 0 skipped on each server. The sole failure is the existing exact-ID explain assertion in [P2] Exact-ID explain assertion rejects MongoDB 7 IDHACK despite using the _id index #94, handled separately by Fix exact-ID explain assertions across MongoDB plans #105.
• MongoDB 8.0.34 could not start in this cloud container because of a tcmalloc CPU-detection error; no tests ran against that server locally.
• Final CI run 41859980224 is green for exact head 02f06f0d4c5afa6f07075009e7d19008ce51e1b6: Windows/Linux builds passed, and all 1,026 tests passed on each of net8/net9/net10 with MongoDB 9.0.4, 0 skipped. Existing CI is unchanged.

Compatibility

Consumers catching raw MongoDB exceptions during iteration should catch StorageException or StorageUnavailableException instead. Keep the persistence engine alive until enumeration finishes. Serializer errors remain unchanged. No API/schema migration or dependency update is required.

Co-authored by Alessandro Giorgetti and Codex (OpenAI).