perf(MongoDB): reduce allocations and improve robustness in lock hot paths

[joesdu]

• Cache IMongoCollection reference in constructor instead of calling GetCollection on every TryAcquireAsync invocation
• Promote immutable BsonDocument sub-expressions (expiredOrMissing, newFencingToken) to static readonly fields; cache newExpiresAt as an instance field (depends on expiry) to avoid rebuilding ~10 BsonDocument objects per busy-wait iteration
• Move TTL index initialization to the start of TryAcquireAsync so it is triggered on every acquisition attempt, not only on success
• Cache ownerFilter and renewUpdate in InnerHandle constructor; lease renewal (~every 10 s) no longer allocates new filter/update objects
• Wrap ReleaseLockAsync in try-catch so network failures during Dispose do not surface unexpected exceptions to callers (TTL index provides eventual cleanup)
• Add internal constructor accepting pre-parsed MongoDistributedLockOptions so MongoDistributedSynchronizationProvider can parse options once and reuse the result across all CreateLock calls
• Fix stale comment "foo" → "expiresAt" in CheckIfIndexExists
• Upgraded Microsoft.SourceLink.GitHub, Microsoft.Build.Tasks.Git, and Microsoft.SourceLink.Common to version 10.0.201 in DistributedLock.ZooKeeper, DistributedLock, and DistributedLockTaker.
• Updated System.IO.Hashing to version 10.0.5 and added its dependencies.
• Updated MongoDB.Bson and MongoDB.Driver versions to 3.7.1.
• Updated System.Diagnostics.DiagnosticSource to version 10.0.5.
• Adjusted DistributedLock.Oracle and DistributedLock.SqlServer versions to 1.0.5 and 1.0.7 respectively.
• Made various transitive dependency updates to ensure compatibility and stability.

[Copilot]

Pull request overview

This PR optimizes the MongoDB-based distributed lock implementation to reduce per-acquire/renew allocations and improve operational robustness (TTL index creation timing, safer dispose behavior), while also updating several NuGet dependencies across the solution.

Changes:

• MongoDB lock hot-path optimizations: cache IMongoCollection, reuse BSON sub-expressions, and cache renewal filter/update definitions.
• Robustness adjustments: trigger TTL index initialization on every acquisition attempt; make release-on-dispose resilient to transient failures.
• Dependency refresh: bump MongoDB driver/BSON, SourceLink/build tooling, DiagnosticSource, System.IO.Hashing, and related transitive pins across projects.

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/DistributedLock.MongoDB/MongoDistributedLock.cs	Caches collection/expressions and reduces allocations in acquire/renew; adjusts TTL init timing; swallows release failures on dispose.
src/DistributedLock.MongoDB/MongoIndexInitializer.cs	Makes index-creation helper static and fixes TTL index existence check logic.
src/DistributedLock.MongoDB/MongoDistributedSynchronizationProvider.cs	Parses Mongo lock options once in provider and reuses them when creating locks.
src/Directory.Packages.props	Central version bumps (e.g., MongoDB.Driver, SourceLink, DiagnosticSource).
src/DistributedLock.MongoDB/packages.lock.json	Updates locked dependency graph for MongoDB package changes.
src/DistributedLock/packages.lock.json	Updates locked dependency graph for core package changes (SourceLink/System.IO.Hashing/etc.).
src/DistributedLock.Azure/packages.lock.json	Updates locked dependency graph for Azure package changes and transitive updates.
src/DistributedLock.Core/packages.lock.json	Updates locked dependency graph (notably SourceLink/System.IO.Hashing changes).
src/DistributedLock.FileSystem/packages.lock.json	Updates locked dependency graph for SourceLink/System.IO.Hashing and transitive updates.
src/DistributedLock.MySql/packages.lock.json	Updates locked dependency graph for SourceLink/System.IO.Hashing and transitive updates.
src/DistributedLock.Oracle/packages.lock.json	Updates locked dependency graph for SourceLink/System.IO.Hashing and transitive updates.
src/DistributedLock.Postgres/packages.lock.json	Updates locked dependency graph for SourceLink/System.IO.Hashing and transitive updates.
src/DistributedLock.Redis/packages.lock.json	Updates locked dependency graph for SourceLink/System.IO.Hashing and transitive updates.
src/DistributedLock.SqlServer/packages.lock.json	Updates locked dependency graph for SourceLink/System.IO.Hashing and transitive updates.
src/DistributedLock.Tests/packages.lock.json	Updates locked dependency graph for tests (now only contains net8.0 graph).
src/DistributedLock.WaitHandles/packages.lock.json	Updates locked dependency graph for SourceLink/System.IO.Hashing and transitive updates.
src/DistributedLock.ZooKeeper/packages.lock.json	Updates locked dependency graph for SourceLink/System.IO.Hashing and transitive updates.
src/DistributedLockTaker/packages.lock.json	Updates locked dependency graph (MongoDB driver and other dependency pins).

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