fix(postgrest): decode PostgrestError details field

Sources/Helpers/SharedModels/PostgrestError.swift

@@ -24,6 +24,13 @@ public struct PostgrestError: Error, Codable, Sendable {
     self.code = code
     self.message = message
   }
+
+  enum CodingKeys: String, CodingKey {
+    case detail = "details"
+    case hint
+    case code
+    case message
+  }
 }
 
 extension PostgrestError: LocalizedError {

Tests/HelpersTests/PostgrestErrorTests.swift

@@ -18,4 +18,35 @@ struct PostgrestErrorTests {
     #expect(error.errorDescription == "test error message")
   }
 
+  @Test
+  func decodesDetailsFromWireKey() throws {
+    let json = """
+      {
+        "code": "23505",
+        "details": "Key (id)=(1) already exists.",
+        "hint": "Use a different id.",
+        "message": "duplicate key value violates unique constraint \\"users_pkey\\""
+      }
+      """
+
+    let error = try JSONDecoder().decode(PostgrestError.self, from: Data(json.utf8))
+
+    #expect(error.detail == "Key (id)=(1) already exists.")
+    #expect(error.hint == "Use a different id.")
+    #expect(error.code == "23505")
+    #expect(error.message == "duplicate key value violates unique constraint \"users_pkey\"")
+  }
+
+  @Test
+  func encodesDetailToWireKey() throws {
+    let error = PostgrestError(detail: "a detail", message: "a message")
+
+    let data = try JSONEncoder().encode(error)
+    let object = try #require(
+      try JSONSerialization.jsonObject(with: data) as? [String: Any]
+    )
+
+    #expect(object["details"] as? String == "a detail")
+    #expect(object["detail"] == nil)
+  }
 }