feat: Add DigestUpsertRequest and LockEntity models

- Introduced DigestUpsertRequest for handling digest upsert requests with properties like ChannelId, Recipient, DigestKey, Events, and CollectUntil.
- Created LockEntity to represent a lightweight distributed lock entry with properties such as Id, TenantId, Resource, Owner, ExpiresAt, and CreatedAt.

feat: Implement ILockRepository interface and LockRepository class

- Defined ILockRepository interface with methods for acquiring and releasing locks.
- Implemented LockRepository class with methods to try acquiring a lock and releasing it, using SQL for upsert operations.

feat: Add SurfaceManifestPointer record for manifest pointers

- Introduced SurfaceManifestPointer to represent a minimal pointer to a Surface.FS manifest associated with an image digest.

feat: Create PolicySimulationInputLock and related validation logic

- Added PolicySimulationInputLock record to describe policy simulation inputs and expected digests.
- Implemented validation logic for policy simulation inputs, including checks for digest drift and shadow mode requirements.

test: Add unit tests for ReplayVerificationService and ReplayVerifier

- Created ReplayVerificationServiceTests to validate the behavior of the ReplayVerificationService under various scenarios.
- Developed ReplayVerifierTests to ensure the correctness of the ReplayVerifier logic.

test: Implement PolicySimulationInputLockValidatorTests

- Added tests for PolicySimulationInputLockValidator to verify the validation logic against expected inputs and conditions.

chore: Add cosign key example and signing scripts

- Included a placeholder cosign key example for development purposes.
- Added a script for signing Signals artifacts using cosign with support for both v2 and v3.

chore: Create script for uploading evidence to the evidence locker

- Developed a script to upload evidence to the evidence locker, ensuring required environment variables are set.

src/__Libraries/StellaOps.Infrastructure.Postgres/Options/PersistenceBackend.cs

@@ -1,75 +0,0 @@
-namespace StellaOps.Infrastructure.Postgres.Options;
-
-/// <summary>
-/// Persistence backend selection for dual-write/migration scenarios.
-/// </summary>
-public enum PersistenceBackend
-{
-    /// <summary>
-    /// Use MongoDB as the primary backend (legacy).
-    /// </summary>
-    Mongo,
-
-    /// <summary>
-    /// Use PostgreSQL as the primary backend.
-    /// </summary>
-    Postgres,
-
-    /// <summary>
-    /// Dual-write mode: write to both backends, read from primary.
-    /// Used during migration phase for data consistency verification.
-    /// </summary>
-    DualWrite
-}
-
-/// <summary>
-/// Persistence options for module backend selection.
-/// </summary>
-public sealed class PersistenceOptions
-{
-    /// <summary>
-    /// Configuration section name.
-    /// </summary>
-    public const string SectionName = "Persistence";
-
-    /// <summary>
-    /// Backend for Authority module.
-    /// </summary>
-    public PersistenceBackend Authority { get; set; } = PersistenceBackend.Mongo;
-
-    /// <summary>
-    /// Backend for Scheduler module.
-    /// </summary>
-    public PersistenceBackend Scheduler { get; set; } = PersistenceBackend.Mongo;
-
-    /// <summary>
-    /// Backend for Notify module.
-    /// </summary>
-    public PersistenceBackend Notify { get; set; } = PersistenceBackend.Mongo;
-
-    /// <summary>
-    /// Backend for Policy module.
-    /// </summary>
-    public PersistenceBackend Policy { get; set; } = PersistenceBackend.Mongo;
-
-    /// <summary>
-    /// Backend for Concelier (vulnerability) module.
-    /// </summary>
-    public PersistenceBackend Concelier { get; set; } = PersistenceBackend.Mongo;
-
-    /// <summary>
-    /// Backend for Excititor (VEX/graph) module.
-    /// </summary>
-    public PersistenceBackend Excititor { get; set; } = PersistenceBackend.Mongo;
-
-    /// <summary>
-    /// In dual-write mode, which backend to read from.
-    /// </summary>
-    public PersistenceBackend DualWriteReadFrom { get; set; } = PersistenceBackend.Mongo;
-
-    /// <summary>
-    /// Enable comparison logging in dual-write mode.
-    /// Logs discrepancies between backends for debugging.
-    /// </summary>
-    public bool DualWriteComparisonLogging { get; set; }
-}

src/__Libraries/StellaOps.Infrastructure.Postgres/ServiceCollectionExtensions.cs

@@ -25,20 +25,6 @@ public static class ServiceCollectionExtensions
         return services;
     }
 
-    /// <summary>
-    /// Adds persistence backend options from configuration.
-    /// </summary>
-    /// <param name="services">Service collection.</param>
-    /// <param name="configuration">Configuration root.</param>
-    /// <returns>Service collection for chaining.</returns>
-    public static IServiceCollection AddPersistenceOptions(
-        this IServiceCollection services,
-        IConfiguration configuration)
-    {
-        services.Configure<PersistenceOptions>(configuration.GetSection(PersistenceOptions.SectionName));
-        return services;
-    }
-
     /// <summary>
     /// Adds PostgreSQL infrastructure with the specified options.
     /// </summary>