Make STDOUT log pattern configurable via WAVE_LOG_STDOUT_PATTERN (#1055)

* Add date to STDOUT log pattern in logback

Include month and day in the console appender timestamp so log entries
are unambiguous when read across days (e.g. in k8s pod logs).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* Make STDOUT log pattern configurable via WAVE_LOG_STDOUT_PATTERN

Allows per-deployment override of the Logback STDOUT pattern (e.g. to
omit the date prefix when the log collector already timestamps lines).
Default pattern is unchanged.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: munishchouhan

docs/configuration.md

@@ -580,3 +580,15 @@ Configure slow endpoint logging to identify HTTP endpoints that exceed expected
 
 `wave.trace.slow-endpoint.duration` *(optional)*
 : Threshold duration for logging slow HTTP endpoints (default: `1m`).
+
+## Logging
+
+Configure the Logback STDOUT log pattern per deployment. Useful when the runtime environment (for example, a log collector) already prefixes each line with a timestamp and you want to omit Wave's own date prefix.
+
+`WAVE_LOG_STDOUT_PATTERN` *(optional, environment variable only)*
+: Logback pattern used by the STDOUT appender (default: `%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg >> wt=%X{requestId}%n`).
+  To omit the date/time prefix, set the variable to a pattern without the leading `%d{...}` token, for example:
+
+  ```
+  WAVE_LOG_STDOUT_PATTERN=[%thread] %-5level %logger{36} - %msg >> wt=%X{requestId}%n
+  ```

src/main/resources/logback.xml

@@ -19,12 +19,13 @@
 <configuration>
     <property name="WAVE_LOG_ROOT" value="${WAVE_LOG_ROOT:-.}" />
     <property name="WAVE_LOG_NAME" value="${WAVE_LOG_NAME:-wave}" />
+    <property name="WAVE_LOG_STDOUT_PATTERN" value="${WAVE_LOG_STDOUT_PATTERN:-%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg >> wt=%X{requestId}%n}" />
 
     <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
         <!-- ansi escape mess-up with non-ansi terminal and loggers -->
         <withJansi>false</withJansi>
         <encoder>
-            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg >> wt=%X{requestId}%n</pattern>
+            <pattern>${WAVE_LOG_STDOUT_PATTERN}</pattern>
         </encoder>
 <!--        <filter class="io.seqera.wave.util.LoggerLevelFilter">-->
 <!--            <level>${WAVE_LOG_LEVEL:-INFO}</level>-->