refactor: update database setup and remove skills migration API

- Changed migration commands in DATABASE_SETUP.md to use `pnpm run sync-skills` and `pnpm run sync-teams`.
- Removed the skills migration API endpoint in route.ts, streamlining the migration process.
- Updated MIGRATION_UUID.md to reflect changes in migration steps and removed the old skills migration script.
- Added new sync scripts for skills and teams in package.json.
- Cleaned up init.sql by removing old teams data insertion and adjusted comments for clarity.

app/api/skills/migrate/route.ts

@@ -1,52 +0,0 @@
-import { NextResponse } from "next/server";
-import { SkillsService } from "@/services";
-import { loadSkillCategoriesFromFiles } from "@/lib/skill-file-loader";
-
-export async function POST() {
-  try {
-    console.log("🚀 Starting skills migration via API...");
-
-    // Load all skill categories from JSON files
-    const skillCategories = loadSkillCategoriesFromFiles();
-
-    console.log(`📊 Found ${skillCategories.length} categories`);
-
-    const totalSkills = skillCategories.reduce(
-      (sum, cat) => sum + cat.skills.length,
-      0
-    );
-    console.log(`🎯 Total skills to migrate: ${totalSkills}`);
-
-    // Bulk insert into database
-    await SkillsService.bulkInsertSkillsFromJSON(skillCategories);
-
-    console.log("✅ Skills migration completed successfully!");
-
-    // Verify the migration
-    const categoriesFromDb = await SkillsService.getSkillCategories();
-    const totalSkillsInDb = categoriesFromDb.reduce(
-      (sum, cat) => sum + cat.skills.length,
-      0
-    );
-
-    return NextResponse.json({
-      success: true,
-      message: "Skills migration completed successfully",
-      stats: {
-        categoriesMigrated: skillCategories.length,
-        skillsMigrated: totalSkills,
-        categoriesInDb: categoriesFromDb.length,
-        skillsInDb: totalSkillsInDb,
-      },
-    });
-  } catch (error) {
-    console.error("❌ Migration failed:", error);
-    return NextResponse.json(
-      {
-        error: "Failed to migrate skills",
-        details: error instanceof Error ? error.message : "Unknown error",
-      },
-      { status: 500 }
-    );
-  }
-}