📝 Add configured logger runtime control API docs

docs/api/configured-logger-close.md

@@ -0,0 +1,74 @@
+---
+name: configured-logger-close
+group: api
+category: runtime
+update-time: 20260512
+description: Close the configured runtime logger sink and return whether the underlying sink reported a close action.
+key-word:
+    - logger
+    - runtime
+    - lifecycle
+    - public
+---
+
+## Configured-logger-close
+
+Close the sink behind a `ConfiguredLogger`. This helper is the config-driven runtime close surface for queue-backed or file-backed sinks.
+
+### Interface
+
+```moonbit
+pub fn ConfiguredLogger::close(self : ConfiguredLogger) -> Bool {}
+```
+
+#### input
+
+- `self : ConfiguredLogger` - Config-driven runtime logger whose sink should be closed.
+
+#### output
+
+- `Bool` - Whether the underlying runtime sink reported a successful close action.
+
+### Explanation
+
+Detailed rules explaining key parameters and behaviors
+
+- Queue-backed file sinks close the wrapped file sink.
+- Plain file sinks forward directly to file close behavior.
+- Console-style sinks usually report `true` because they do not have a meaningful close step.
+- This helper delegates to `RuntimeSink::close(...)` through the configured logger wrapper.
+
+### How to Use
+
+Here are some specific examples provided.
+
+#### When Need Config-driven Runtime Teardown
+
+When a config-built logger should release its sink resources:
+```moonbit
+ignore(logger.close())
+```
+
+In this example, sink teardown happens through the configured logger facade.
+
+#### When Need To Observe Close Outcome
+
+When application code wants a success flag from runtime close behavior:
+```moonbit
+let closed = logger.close()
+```
+
+In this example, callers can branch on the reported close result.
+
+### Error Case
+
+e.g.:
+- If the runtime sink has no real close action, the helper may still return `true` as a no-op success.
+
+- If callers need a file-specific close path with queue flush nuances, `file_close()` may be the better API.
+
+### Notes
+
+1. This is the generic configured runtime close helper.
+
+2. Prefer file-specific helpers when the sink shape is known to be file-backed.