feat: billing layer v1.3.86 — PostgreSQL statistics

- internal/billing: Store interface + pgStore (pgx/v5 pool) + NoopStore
- factory.go: NewStore() from BILLING_DSN env var (NoopStore fallback)
- Server.billing: injected into Config, initialized in main
- handleInvokeFunction: record invocation (TriggerConsole)
- invokeInternalFunction: record invocation (TriggerHTTP)
- handleCreateFunction: record event_type=create
- handleCloneFunction: record event_type=clone
- handleDeleteFunction: record event_type=delete
- table: invocations (namespace, function_name, trigger_type, duration_ms, status_code...)
- BILLING_DSN added to console.yaml
- pgx/v5 added to go.mod/go.sum

console/internal/api/function_crud.go

@@ -21,6 +21,7 @@ import (
 	"strings"
 	"time"
 
+	"fission-console/internal/billing"
 	"fission-console/internal/fission"
 
 	corev1 "k8s.io/api/core/v1"
@@ -228,6 +229,16 @@ func (s *Server) handleDeleteFunction(w http.ResponseWriter, r *http.Request, na
 
 	// (reconciler NS удалён — за FISSION_RESOURCE_NAMESPACES теперь отвечает Layer 1 NSWatcher)
 
+	s.billing.RecordInvocation(billing.Invocation{
+		Namespace:    ns,
+		FunctionName: name,
+		TriggerType:  billing.TriggerEvent,
+		StartedAt:    time.Now(),
+		StatusCode:   http.StatusOK,
+		RecordedBy:   "console",
+		EventType:    "delete",
+	})
+
 	writeAnyJSON(w, http.StatusOK, map[string]any{"deleted": true, "name": name, "package": pkgName})
 }