chore: Apply modern Go idioms and perform code cleanup

This commit introduces a series of small refactorings and style fixes across the codebase to improve consistency and leverage modern Go features.

Key changes include:
- Adopting the Go 1.22 `reflect.TypeFor` generic function.
- Replacing `interface{}` with the `any` type alias for better readability.
- Using the explicit `http.NoBody` constant for HTTP requests.
- Updating octal literals for file permissions to the `0o` prefix syntax.
- Standardizing comment formatting and fixing minor typos.
- Removing redundant blank lines and organizing imports.

internal/version/version.go

@@ -14,7 +14,7 @@ var (
 	// - Structured logging with slog
 	// - Configuration via environment variables
 	// - Context-aware HTTP requests
-	// - Comprehensive benchmarks and examples
+	// - Comprehensive benchmarks and examples.
 	Version = "1.0.0"
 
 	// BuildTime is the time the binary was built.