feat(dal, api): в таблицах Process, Subprocess, Tnks, Works поле EsppId - уникальное. Обновлены соответсвующе контроллеры (валидация esppId), добавлены методы удаления если нет дочерних элементов.

PARR.DAL/Migrations/20240519224359_tblProcessSubTnkWorkUniqueEsppId.cs

@@ -0,0 +1,58 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace PARR.DAL.Migrations
+{
+    /// <inheritdoc />
+    public partial class tblProcessSubTnkWorkUniqueEsppId : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateIndex(
+                name: "IX_Works_EsppId",
+                table: "Works",
+                column: "EsppId",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Tnks_EsppId",
+                table: "Tnks",
+                column: "EsppId",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Subprocesses_EsppId",
+                table: "Subprocesses",
+                column: "EsppId",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Processes_EsppId",
+                table: "Processes",
+                column: "EsppId",
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropIndex(
+                name: "IX_Works_EsppId",
+                table: "Works");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Tnks_EsppId",
+                table: "Tnks");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Subprocesses_EsppId",
+                table: "Subprocesses");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Processes_EsppId",
+                table: "Processes");
+        }
+    }
+}