Update frame work and workspace codebase

internal/monitoring/prometheus.go

@@ -0,0 +1,60 @@
+package monitoring
+
+import (
+	"context"
+	"fmt"
+	"strings"
+)
+
+// PrometheusExporter exports metrics in Prometheus format
+type PrometheusExporter struct {
+	Collectors []Collector
+}
+
+func NewPrometheusExporter(collectors ...Collector) *PrometheusExporter {
+	return &PrometheusExporter{Collectors: collectors}
+}
+
+// Export collects all metrics and formats them as Prometheus text format
+func (e *PrometheusExporter) Export(ctx context.Context) string {
+	var builder strings.Builder
+	allErrors := []string{}
+
+	for _, collector := range e.Collectors {
+		collection := collector.Collect(ctx)
+		allErrors = append(allErrors, collection.Errors...)
+
+		for _, metric := range collection.Metrics {
+			// Format: metric_name{label1="value1",label2="value2"} value
+			builder.WriteString(metric.Name)
+			if len(metric.Labels) > 0 {
+				builder.WriteString("{")
+				first := true
+				for k, v := range metric.Labels {
+					if !first {
+						builder.WriteString(",")
+					}
+					builder.WriteString(fmt.Sprintf(`%s="%s"`, k, escapeLabelValue(v)))
+					first = false
+				}
+				builder.WriteString("}")
+			}
+			builder.WriteString(fmt.Sprintf(" %v\n", metric.Value))
+		}
+	}
+
+	// Add error metrics if any
+	if len(allErrors) > 0 {
+		builder.WriteString(fmt.Sprintf("monitoring_collector_errors_total %d\n", len(allErrors)))
+	}
+
+	return builder.String()
+}
+
+func escapeLabelValue(v string) string {
+	v = strings.ReplaceAll(v, "\\", "\\\\")
+	v = strings.ReplaceAll(v, "\"", "\\\"")
+	v = strings.ReplaceAll(v, "\n", "\\n")
+	return v
+}
+