feat(jobs): add durable PG queue reclaim, slog, and richer metrics

JSON slog в ключевых пакетах; Prometheus path_group, job_audit_depth, upstream breaker; job_audit ClaimQueued/ReclaimStaleRunning + Adopt loop для HA после рестарта.

Co-authored-by: Cursor <[email protected]>

internal/maintenance/scheduler.go

@@ -2,8 +2,8 @@ package maintenance
 
 import (
 	"context"
+	"evobgp/internal/logging"
 	"fmt"
-	"log"
 	"strings"
 	"sync"
 	"time"
@@ -35,7 +35,7 @@ func StartScheduler(ctx context.Context, provider *ConfigProvider, enqueue func(
 				}
 				sched, err := parser.Parse(p.Schedule)
 				if err != nil {
-					log.Printf("maintenance: invalid cron for policy %s: %v", p.ID, err)
+					logging.Default().Info(fmt.Sprintf("maintenance: invalid cron for policy %s: %v", p.ID, err))
 					continue
 				}
 				schedules[p.ID] = sched
@@ -81,5 +81,5 @@ func StartScheduler(ctx context.Context, provider *ConfigProvider, enqueue func(
 			}
 		}
 	}()
-	log.Printf("maintenance: policy scheduler started (tick=%s)", tick)
+	logging.Default().Info(fmt.Sprintf("maintenance: policy scheduler started (tick=%s)", tick))
 }