Refactor database environment variable usage across workflows and application code

- Updated Gitea workflows to standardize on `DB_NAME` instead of `DB_DATABASE` for database name references.
- Modified deployment, backup, reset, and restore workflows to ensure consistent environment variable usage.
- Removed dotenv dependency and preload script, transitioning to environment variable management directly in scripts.
- Adjusted application code to utilize `DB_NAME` for database connections and logging.
- Enhanced README to reflect changes in environment variable configuration and usage.
- Cleaned up package.json scripts to remove unnecessary preload references.

ecosystem.config.cjs

@@ -7,10 +7,8 @@ module.exports = {
   apps: [
     {
       name: 'flyer-crawler-api', // The name of our API application in PM2
-      // Use tsx as the interpreter and pass the preload script via node_args.
       script: './node_modules/.bin/tsx',
-      args: 'server.ts',
-      node_args: '-r ./preload.ts',
+      args: 'server.ts', // tsx will execute this file
       // Explicitly set the working directory. This is crucial for reliability.
       cwd: '/var/www/flyer-crawler.projectium.com',
       env_production: {
@@ -19,10 +17,8 @@ module.exports = {
     },
     {
       name: 'flyer-crawler-worker', // The name of our worker process in PM2
-      // Use the same preload mechanism for the worker.
       script: './node_modules/.bin/tsx',
-      args: 'src/services/queueService.server.ts',
-      node_args: '-r ./preload.ts',
+      args: 'src/services/queueService.server.ts', // tsx will execute this file
       // Explicitly set the working directory.
       cwd: '/var/www/flyer-crawler.projectium.com',
       env_production: {
@@ -31,11 +27,9 @@ module.exports = {
     },
     {
       name: 'flyer-crawler-analytics-worker', // A dedicated worker for analytics
-      // Use the same preload mechanism.
       script: './node_modules/.bin/tsx',
       // Point to the main worker service file. It will start all workers.
-      args: 'src/services/queueService.server.ts',
-      node_args: '-r ./preload.ts',
+      args: 'src/services/queueService.server.ts', // tsx will execute this file
       cwd: '/var/www/flyer-crawler.projectium.com',
       env_production: {
         NODE_ENV: 'production',