Restructure solution layout by module

src/Aoc/__Libraries/StellaOps.Aoc/AocViolationCode.cs

@@ -0,0 +1,34 @@
+namespace StellaOps.Aoc;
+
+public enum AocViolationCode
+{
+    None = 0,
+    ForbiddenField,
+    MergeAttempt,
+    IdempotencyViolation,
+    MissingProvenance,
+    SignatureInvalid,
+    DerivedFindingDetected,
+    UnknownField,
+    MissingRequiredField,
+    InvalidTenant,
+    InvalidSignatureMetadata,
+}
+
+public static class AocViolationCodeExtensions
+{
+    public static string ToErrorCode(this AocViolationCode code) => code switch
+    {
+        AocViolationCode.ForbiddenField => "ERR_AOC_001",
+        AocViolationCode.MergeAttempt => "ERR_AOC_002",
+        AocViolationCode.IdempotencyViolation => "ERR_AOC_003",
+        AocViolationCode.MissingProvenance => "ERR_AOC_004",
+        AocViolationCode.SignatureInvalid => "ERR_AOC_005",
+        AocViolationCode.DerivedFindingDetected => "ERR_AOC_006",
+        AocViolationCode.UnknownField => "ERR_AOC_007",
+        AocViolationCode.MissingRequiredField => "ERR_AOC_004",
+        AocViolationCode.InvalidTenant => "ERR_AOC_004",
+        AocViolationCode.InvalidSignatureMetadata => "ERR_AOC_005",
+        _ => "ERR_AOC_000",
+    };
+}