fix(plugin-mongodb): Atlas connect crash, TLS -9838, Unauthorized on import

[datlechin]

Summary

Fixes three independent MongoDB Atlas connect bugs surfaced after upgrading to macOS 26. Each was hit by a real user (#1249 crash report, follow-up TLS error, follow-up Unauthorized on URL import).

• Crash (TablePro 0.40.3 crashes with MongoDB driver on macOS 26 (Apple Silicon) #1249) — MongoDBConnection.serverVersion() did queue.sync on a queue it was already running on whenever the cache was cold and the call came from inside an on-queue block (e.g. listDatabasesSync). Triggered dispatch_sync called on queue already owned by current thread BREAKPOINT on every fresh connect. Fixed by detecting on-queue re-entry via a per-instance DispatchSpecificKey and calling fetchServerVersionSync() directly when already on the queue.
• TLS handshake fails on macOS 26 with errSSLPeerInternalError (-9838) against Atlas. Root cause: libmongoc was built with Apple Secure Transport (MONGOC_ENABLE_SSL_SECURE_TRANSPORT=1), which now misnegotiates TLS 1.3 with Atlas on macOS 26. OpenSSL handshake works against the same endpoints (verified with openssl s_client). Rebuilt libmongoc 1.28.1 with OpenSSL 3.4.3 backend; the app already bundles OpenSSL dylibs for Redis/MSSQL/MySQL so the link surface is unchanged.
• Import URL gives Unauthenticated when the URL has no database path. MongoDBPluginDriver.connect() called listDatabases on admin for any connection without an explicit DB; Atlas users restricted to a single database lack listDatabases privilege and the call threw, killing the connection. Two-part fix: pass authorizedDatabases: true (MongoDB 4.0+) so the server filters to databases the user can actually see, and don't kill the connection when listDatabases still fails (auth was verified by the ping during connect() itself).

Out-of-band release work already done

• Libs/libmongoc{,_arm64,_x86_64,_universal}.a and Libs/libbson*.a rebuilt with OpenSSL backend.
• tablepro-libs-v1.tar.gz re-uploaded to the libs-v1 GitHub release so CI and fresh clones pick up the new statics. Libs/checksums.sha256 in this PR matches the uploaded archive.
• Plugins/MongoDBDriverPlugin/CLibMongoc/include/mongoc/mongoc-config.h regenerated to flip MONGOC_ENABLE_SSL_* defines.
• MongoDBDriver target link flags updated: dropped -framework Security/CoreFoundation, added -lssl.3 -lcrypto.3, extended LIBRARY_SEARCH_PATHS / LD_RUNPATH_SEARCH_PATHS to include Libs/dylibs.

Follow-up (not in this PR)

MongoDB is a registry-only plugin. After merge, re-tag plugin-mongodb-v<next> so CI publishes a ZIP, then bump plugins.json in TableProApp/plugins (version, downloadURL, sha256 for both architectures).

Test plan

• Reproduce TablePro 0.40.3 crashes with MongoDB driver on macOS 26 (Apple Silicon) #1249 crash on macOS 26 with stock MongoDBDriver 1.0.22; confirm rebuilt plugin no longer crashes on connect.
• OpenSSL s_client handshake against ac-h69imyr-shard-00-00.7uzbwhl.mongodb.net:27017 succeeds (control for layer where -9838 originates).
• nm Libs/libmongoc_arm64.a shows OpenSSL symbols (SSL_CTX_new) and zero Secure Transport references (SSLHandshake, SSLCreateContext).
• otool -L MongoDBDriver shows @rpath/libssl.3.dylib and @rpath/libcrypto.3.dylib, no Security framework.
• Test Atlas SRV connect with restricted-database user via Import URL flow with no /db path; previously returned Unauthorized, should now succeed.
• Test Atlas SRV connect with admin user; listDatabases should still return the full list.
• Test classic non-Atlas MongoDB connect (no SRV) to make sure the OpenSSL backend still talks to plain TLS / unencrypted MongoDB.