logs: standardise log filenames to xamxam-{service}-{date}.log

docs/monolog-plan.md

@@ -45,7 +45,7 @@ Do not replace any existing class yet. Just build the foundation.
 ```
 
 Each channel gets:
-- A `RotatingFileHandler` writing to `storage/logs/{channel}.log`, keeping 30 days
+- A `RotatingFileHandler` writing to `xamxam-{channel}.log` (production: `/var/log/xamxam/`; dev: `storage/logs/`), keeping 30 days
 - A `JsonFormatter` so log lines stay JSON (preserving the existing format contract)
 - Log level set from an environment variable (`LOG_LEVEL`, defaulting to `WARNING` in production, `DEBUG` in dev)
 
@@ -58,7 +58,7 @@ one file at a time without passing instances around.
 
 - Rewrite `AppLogger` as a thin wrapper that delegates to `Logger::get('app')`
 - Keep the existing public method signatures identical — no call sites change in this step
-- Run the app, verify log output appears in `storage/logs/app.log`
+- Run the app, verify log output appears in `xamxam-app.log` (see the log dir for the active SAPI)
 - Delete the old file-writing implementation inside `AppLogger`, keep the class as a facade for now
 
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