[FLINK-36573][cdc-connector][mysql] Add table information of binlog offsets when checkpointing

flink-cdc-connect/flink-cdc-source-connectors/flink-connector-mysql-cdc/src/main/java/org/apache/flink/cdc/connectors/mysql/source/reader/MySqlSourceReader.java

@@ -530,7 +530,11 @@ public class MySqlSourceReader<T>
                 return;
             }
             BinlogOffset offset = split.asBinlogSplit().getStartingOffset();
-            LOG.info("Binlog offset on checkpoint {}: {}", checkpointId, offset);
+            LOG.info(
+                    "Binlog offset for tables {} on checkpoint {}: {}",
+                    split.asBinlogSplit().getTables(),
+                    checkpointId,
+                    offset);
         }
     }
 

flink-cdc-connect/flink-cdc-source-connectors/flink-connector-mysql-cdc/src/main/java/org/apache/flink/cdc/connectors/mysql/source/split/MySqlBinlogSplit.java

@@ -108,6 +108,16 @@ public class MySqlBinlogSplit extends MySqlSplit {
         return totalFinishedSplitSize == finishedSnapshotSplitInfos.size();
     }
 
+    public String getTables() {
+        String tables;
+        if (tableSchemas != null) {
+            tables = tableSchemas.keySet().toString();
+        } else {
+            tables = "[]";
+        }
+        return tables;
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) {
@@ -142,10 +152,13 @@ public class MySqlBinlogSplit extends MySqlSplit {
 
     @Override
     public String toString() {
+        String tables = getTables();
         return "MySqlBinlogSplit{"
                 + "splitId='"
                 + splitId
                 + '\''
+                + ", tables="
+                + tables
                 + ", offset="
                 + startingOffset
                 + ", endOffset="