CASSANALYTICS-189 Add CapturePublishedSchema metric to SidecarCdcStats (#230)

Patch by Jyothsna Konisa; Reviewed by Yifan Cai for CASSANALYTICS-189

Author: jyothsnakonisa

CHANGES.txt

@@ -1,5 +1,6 @@
 0.5.0
 -----
+ * Add CapturePublishedSchema metric to SidecarCdcStats (CASSANALYTICS-189)
  * Expand list of architecture that supports unaligned access in FastByteOperations (CASSANALYTICS-188)
  * Fix FastByteOperations Silently Falling Back to Pure-Java Comparator (CASSANALYTICS-187)
  * AbstractSchemaBuilder.build() drops the cdc flag, silently disabling CDC on all tables (CASSANALYTICS-186)

cassandra-analytics-cdc-sidecar/src/main/java/org/apache/cassandra/cdc/sidecar/SidecarCdcStats.java

@@ -267,4 +267,11 @@ default void captureCdcTableNotEnabled()
     default void captureCdcOnRepairEnabled()
     {
     }
+
+    /**
+     * Schema has been published.
+     */
+    default void capturePublishedSchema()
+    {
+    }
 }