Refactor Docker and Makefile configurations for improved build processes

- Updated docker-compose.tools.yml to mount source code at /src and set working directory for backend tools, ensuring proper Go module caching.
- Modified Dockerfile.tools to install the latest golangci-lint version compatible with Go 1.24 and adjusted working directory for build-time operations.
- Enhanced Makefile to build backend tools before running tests and linting, ensuring dependencies are up-to-date and improving overall workflow efficiency.
- Refactored test and handler files to include error handling for database operations, enhancing reliability and debugging capabilities.

frontend-nuxt/eslint.config.mjs

@@ -1,11 +1,14 @@
 // @ts-check
 import withNuxt from './.nuxt/eslint.config.mjs'
 
-export default withNuxt({
-  rules: {
-    '@typescript-eslint/no-explicit-any': 'warn',
-    '@typescript-eslint/no-unused-vars': 'warn',
-    '@typescript-eslint/consistent-type-imports': ['warn', { prefer: 'type-imports' }],
-    '@typescript-eslint/no-require-imports': 'off',
+export default withNuxt(
+  { ignores: ['eslint.config.mjs'] },
+  {
+    rules: {
+      '@typescript-eslint/no-explicit-any': 'warn',
+      '@typescript-eslint/no-unused-vars': 'warn',
+      '@typescript-eslint/consistent-type-imports': ['warn', { prefer: 'type-imports' }],
+      '@typescript-eslint/no-require-imports': 'off',
+    },
   },
-})
+)