Refactor and update test projects, remove obsolete tests, and upgrade dependencies

- Deleted obsolete test files for SchedulerAuditService and SchedulerMongoSessionFactory.
- Removed unused TestDataFactory class.
- Updated project files for Mongo.Tests to remove references to deleted files.
- Upgraded BouncyCastle.Cryptography package to version 2.6.2 across multiple projects.
- Replaced Microsoft.Extensions.Http.Polly with Microsoft.Extensions.Http.Resilience in Zastava.Webhook project.
- Updated NetEscapades.Configuration.Yaml package to version 3.1.0 in Configuration library.
- Upgraded Pkcs11Interop package to version 5.1.2 in Cryptography libraries.
- Refactored Argon2idPasswordHasher to use BouncyCastle for hashing instead of Konscious.
- Updated JsonSchema.Net package to version 7.3.2 in Microservice project.
- Updated global.json to use .NET SDK version 10.0.101.

docs/24_OFFLINE_KIT.md

@@ -391,3 +391,5 @@ See the detailed rules in
 * **Sovereign mode rationale:** `/sovereign/`
 * **Security policy:** `/security/#reporting-a-vulnerability`
 * **CERT-Bund snapshots:** `python src/Tools/certbund_offline_snapshot.py --help` (see `docs/modules/concelier/operations/connectors/certbund.md`)
+* **PostgreSQL operations:** `docs/operations/postgresql-guide.md` - performance tuning, monitoring, backup/restore, and scaling
+* **Database specification:** `docs/db/SPECIFICATION.md` - schema design, migration patterns, and module ownership