stabilizaiton work - projects rework for maintenanceability and ui livening

src/__Libraries/StellaOps.Artifact.Infrastructure/S3UnifiedArtifactStoreOptions.cs

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+// -----------------------------------------------------------------------------
+// S3UnifiedArtifactStoreOptions.cs
+// Sprint: SPRINT_20260118_017_Evidence_artifact_store_unification
+// Task: AS-002 - Implement S3-backed ArtifactStore
+// Description: Configuration options for S3-backed artifact store
+// -----------------------------------------------------------------------------
+namespace StellaOps.Artifact.Infrastructure;
+
+/// <summary>
+/// Configuration options for S3-backed artifact store.
+/// </summary>
+public sealed class S3UnifiedArtifactStoreOptions
+{
+    /// <summary>
+    /// S3 bucket name.
+    /// </summary>
+    public string BucketName { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Path prefix within the bucket.
+    /// </summary>
+    public string Prefix { get; set; } = "artifacts";
+
+    /// <summary>
+    /// Whether to use content-addressable storage for deduplication.
+    /// </summary>
+    public bool EnableDeduplication { get; set; } = true;
+
+    /// <summary>
+    /// Whether to store metadata as sidecar JSON files.
+    /// </summary>
+    public bool UseSidecarMetadata { get; set; } = false;
+
+    /// <summary>
+    /// Whether to overwrite existing artifacts.
+    /// </summary>
+    public bool AllowOverwrite { get; set; } = false;
+
+    /// <summary>
+    /// Maximum artifact size in bytes.
+    /// </summary>
+    public long MaxArtifactSizeBytes { get; set; } = 100 * 1024 * 1024; // 100MB
+
+    /// <summary>
+    /// Retention policies per artifact type. Key is ArtifactType enum name.
+    /// Sprint: SPRINT_20260118_017 (AS-002)
+    /// </summary>
+    public Dictionary<string, RetentionPolicy> RetentionPolicies { get; set; } = new()
+    {
+        ["Sbom"] = new RetentionPolicy { RetentionDays = 365 * 7, DeleteAfterExpiry = false },
+        ["Vex"] = new RetentionPolicy { RetentionDays = 365 * 7, DeleteAfterExpiry = false },
+        ["Dsse"] = new RetentionPolicy { RetentionDays = 365 * 7, DeleteAfterExpiry = false },
+        ["RekorProof"] = new RetentionPolicy { RetentionDays = 365 * 10, DeleteAfterExpiry = false },
+        ["Attestation"] = new RetentionPolicy { RetentionDays = 365 * 7, DeleteAfterExpiry = false },
+        ["BuildLog"] = new RetentionPolicy { RetentionDays = 365, DeleteAfterExpiry = true },
+        ["ScanResult"] = new RetentionPolicy { RetentionDays = 365 * 2, DeleteAfterExpiry = true },
+        ["Temporary"] = new RetentionPolicy { RetentionDays = 30, DeleteAfterExpiry = true }
+    };
+
+    /// <summary>
+    /// Default retention policy for unspecified artifact types.
+    /// </summary>
+    public RetentionPolicy DefaultRetentionPolicy { get; set; } = new()
+    {
+        RetentionDays = 365 * 5,
+        DeleteAfterExpiry = false
+    };
+}