feat: upgrade Go version and improve build system

- Upgrade Go version from 1.22 to 1.24 for better performance and security
- Add comprehensive golangci-lint configuration with:
  - Enable additional linters: bodyclose, dupl, exportloopref, gocognit, gocritic, gosec, prealloc
  - Configure complexity thresholds (cyclomatic: 15, cognitive: 20)
  - Set up security scanning with gosec
  - Add code quality rules with revive
  - Exclude test files from certain strict checks
- Update dependencies to latest stable versions:
  - aws-sdk-go-v2: various components updated
  - Azure SDK: updated to v1.18.0 for azcore
  - etcd client: remains at v3.6.1 for stability
  - prometheus client: updated to v1.22.0
  - zerolog: updated to v1.34.0
- Enhance logging utilities:
  - Add GetLogLevelOrDebug function for flexible log level configuration
  - Support "warning" as alias for "warn" level
  - Improve error handling for invalid log levels

These changes improve code quality checks, leverage latest Go features,
and ensure dependencies are up-to-date with security patches.

utils/logging.go

@@ -46,6 +46,10 @@ func SetupDefaultLogger(levelStr string) {
 }
 
 func GetLogLevelOrDebug(levelStr string) zerolog.Level {
+	if levelStr == "" {
+		return zerolog.DebugLevel
+	}
+	
 	levelStr = strings.ToLower(levelStr)
 	if levelStr == "warning" {
 		levelStr = "warn"