Release Note 1.6.1

# Features & Improvements
1. oraclecdc synchronizes the xml type #356
2. Support reading varint type #363
3. Support ipv4 ipv6 type #365
4. Add metric #377 for lookup join
5. Support synchronization of mongdb cdc #343

# Bug
1. Fix the problem that schemachange does not take effect in some scenarios #354
2. Fix abort failure issue #359
3. Fix the problem of default value synchronization being compatible with other databases #361
4. Fix the problem of labelexists when synchronizing multiple tables #362
5. Fix the problem that enableBatchMode does not take effect #372
6. Fix the problem of DorisTypeMapper time type matching error #379
7. Fix the problem of multi-database synchronization uid conflict #382
8. Fix flinksql push down problem #383
9. Fix doris.filter.query incompatibility issue #373

# Thanks
@bingquanzhao
@caoliang-web
@DongLiang-0
@huyuanfeng2018
@JNSimba
@vinlee19

No target file or test is named. Start by reviewing the referenced issues #356, #363, #365, #377, #343, #354, #359, #361, #362, #372, #379, #382, #383, and #373; done means a 1.6.1 note accurately groups the listed improvements and bugs and credits the contributors.

Written by the indexing model from the issue text.