docs: close arch-review 08 drift batch — Commons Observability folder, site-repo exception, csproj separator, docs/components scope, DelmiaNotifier convention exception

Claude-Session: https://claude.ai/code/session_01MtdgwpEeCUn6cUA5f1LMPj

docs/requirements/Component-Commons.md

@@ -291,6 +291,10 @@ ZB.MOM.WW.ScadaBridge.Commons/
 │   │                               #   SiteCallRelayMessages
 │   └── Management/                 # HTTP/ClusterClient management commands + registry,
 │                                   #   including TransportCommands (Export/Preview/Import bundle)
+├── Observability/                  # ScadaBridgeTelemetry — shared Meter ("ZB.MOM.WW.ScadaBridge") +
+│                                   #   counters/observable-gauges (deployments applied, inbound-API
+│                                   #   requests/abandoned execs, S&F replication failures, site
+│                                   #   connections up, S&F queue depth) with emit helpers
 ├── Serialization/                  # OpcUaEndpointConfigSerializer (typed↔legacy JSON)
 └── Validators/                     # OpcUaEndpointConfigValidator
 ```

docs/requirements/Component-ConfigurationDatabase.md

@@ -167,6 +167,8 @@ Repository interfaces are defined in **Commons** alongside the POCO entity class
 
 Each implementation class uses the DbContext internally and works with the POCO entity classes from Commons. Consuming components depend only on Commons (for interfaces and entities) — they never reference this component or EF Core directly. The DI container in the Host wires the implementations to the interfaces.
 
+Site-side exception: read-only SQLite-backed implementations of shared repository interfaces live in `src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Repositories/` (currently `SiteExternalSystemRepository`) — same Commons interface, site-local store, writes throw `NotSupportedException` because site artifacts are managed exclusively by deployment from Central.
+
 #### Native Alarm Source Repository Methods
 
 `ITemplateEngineRepository` (implemented by `TemplateEngineRepository`) gains CRUD for both native alarm source entities, mirroring the existing alarm-override methods one-for-one: