change skill buy to be generally 1 point = 1 mastery level (Trauma-Station#1221)

Co-authored-by: deltanedas <@deltanedas:kde.org>

Author: deltanedas

Content.Server.Database/Migrations/Postgres/20260312224025_TraumaRemovedRemovedSkills.Designer.cs

@@ -0,0 +1,29 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Content.Server.Database.Migrations.Postgres
+{
+    /// <inheritdoc />
+    public partial class TraumaRemovedRemovedSkills : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "knowledge_removed",
+                table: "profile");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "knowledge_removed",
+                table: "profile",
+                type: "text",
+                nullable: false,
+                defaultValue: "");
+        }
+    }
+}

Content.Server.Database/Migrations/Postgres/20260312224025_TraumaRemovedRemovedSkills.cs

@@ -1238,11 +1238,6 @@ protected override void BuildModel(ModelBuilder modelBuilder)
                         .HasColumnType("text")
                         .HasColumnName("knowledge_mastery");
 
-                    b.Property<string>("KnowledgeRemoved")
-                        .IsRequired()
-                        .HasColumnType("text")
-                        .HasColumnName("knowledge_removed");
-
                     b.Property<JsonDocument>("Markings")
                         .HasColumnType("jsonb")
                         .HasColumnName("markings");