refactor(s3): consolidate semantic boundaries and remove s3-common (#3012)

* refactor(common): introduce rustfs-data-usage core crate

* refactor(concurrency): migrate workers crate into concurrency

* refactor(crypto): migrate appauth token APIs into crypto

* fix docs urls

* remove unused crate

* refactor(data-usage): switch consumers to rustfs-data-usage

* chore(fmt): apply cargo fmt and lockfile sync

* refactor(common): remove data_usage compatibility re-export

* refactor(capacity): move capacity_scope to object-capacity

* refactor(io-metrics): relocate internode metrics from common

* refactor(common): decouple scanner report from madmin

* chore(fmt): normalize import ordering after pre-commit

* refactor(s3): split s3 types and ops crates

* refactor(s3): centralize event version and safe parsing

* refactor(s3): add op-event compatibility guardrails

* refactor(s3): add runtime op-event mismatch observability

* refactor(s3): extract delete event mapping helper

* refactor(s3): extract put event mapping helper

* refactor(s3): consolidate remaining event semantic helpers

* refactor(s3): add op-event coverage checks and observability alerts

* refactor(s3-ops): consolidate op-event semantic mapping

* refactor(scanner): remove last_minute wrapper module

* refactor(scanner): consolidate duplicated data usage models

.docker/observability/grafana/dashboards/rustfs.json

@@ -9037,13 +9037,13 @@
             "uid": "${datasource}"
           },
           "editorMode": "code",
-          "expr": "{__name__=~\"rustfs_(notification|audit)_.*\",job=~\"$job\"}",
+          "expr": "{__name__=~\"rustfs_(notification|audit|log_chain)_.*\",job=~\"$job\"}",
           "legendFormat": "{{__name__}}",
           "range": true,
           "refId": "A"
         }
       ],
-      "title": "Notification / Audit (All)",
+      "title": "Notification / Audit / LogChain (All)",
       "type": "timeseries"
     },
     {

.docker/observability/prometheus-rules/rustfs-dashboard.yml

@@ -38,3 +38,16 @@ groups:
         expr: sum by (job) (rate(rustfs_scanner_buckets_scanned_total[5m]))
       - record: rustfs:scanner_cycles_success:rate5m
         expr: sum by (job) (rate(rustfs_scanner_cycles_total{result="success"}[5m]))
+
+      - record: rustfs:log_chain_op_event_mismatch:rate5m
+        expr: sum by (job) (rate(rustfs_log_chain_op_event_mismatch_total[5m]))
+
+      - alert: RustFSLogChainOpEventMismatchDetected
+        expr: rustfs:log_chain_op_event_mismatch:rate5m > 0
+        for: 10m
+        labels:
+          severity: warning
+          component: s3-log-chain
+        annotations:
+          summary: "RustFS log-chain op/event mismatch detected"
+          description: "job={{ $labels.job }} has non-zero rustfs_log_chain_op_event_mismatch_total rate for more than 10m. Check s3 op/event mapping changes."