Add full monorepo: virtual-banker, backend, frontend, docs, scripts, deployment

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/tracing/tracer.go

@@ -0,0 +1,81 @@
+package tracing
+
+import (
+	"context"
+	"fmt"
+	"time"
+)
+
+// Tracer provides distributed tracing
+type Tracer struct {
+	serviceName string
+}
+
+// NewTracer creates a new tracer
+func NewTracer(serviceName string) *Tracer {
+	return &Tracer{serviceName: serviceName}
+}
+
+// Span represents a trace span
+type Span struct {
+	TraceID    string
+	SpanID     string
+	ParentID   string
+	Name       string
+	StartTime  time.Time
+	EndTime    time.Time
+	Tags       map[string]string
+	Logs       []LogEntry
+}
+
+// LogEntry represents a log entry in a span
+type LogEntry struct {
+	Timestamp time.Time
+	Fields    map[string]interface{}
+}
+
+// StartSpan starts a new span
+func (t *Tracer) StartSpan(ctx context.Context, name string) (*Span, context.Context) {
+	traceID := generateID()
+	spanID := generateID()
+
+	span := &Span{
+		TraceID:   traceID,
+		SpanID:    spanID,
+		Name:      name,
+		StartTime: time.Now(),
+		Tags:      make(map[string]string),
+		Logs:      []LogEntry{},
+	}
+
+	// Add to context
+	ctx = context.WithValue(ctx, "trace_id", traceID)
+	ctx = context.WithValue(ctx, "span_id", spanID)
+
+	return span, ctx
+}
+
+// Finish finishes a span
+func (s *Span) Finish() {
+	s.EndTime = time.Now()
+	// In production, this would send span to tracing backend
+}
+
+// SetTag sets a tag on the span
+func (s *Span) SetTag(key, value string) {
+	s.Tags[key] = value
+}
+
+// Log adds a log entry to the span
+func (s *Span) Log(fields map[string]interface{}) {
+	s.Logs = append(s.Logs, LogEntry{
+		Timestamp: time.Now(),
+		Fields:    fields,
+	})
+}
+
+// generateID generates a random ID
+func generateID() string {
+	return fmt.Sprintf("%x", time.Now().UnixNano())
+}
+