DP-1723: Changelog

CHANGELOG.MD

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+# Change Log
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/)
+and this project adheres to [Semantic Versioning](http://semver.org/).
+
+## [Unreleased] - yyyy-mm-dd
+
+## [1.8.3] - 2023-08-30
+
+### Fixed
+
+- Error logging for not successful file upload.
+- Committing an offset for heterogeneous topics.
+
+### Changed
+
+- `connect.ems.flattener.enable` is true by default.
+
+## [1.8.2] - 2023-08-25
+
+### Added
+
+- Proper logging when connector is misconfigured for `connect.ems.order.field.name`.
+
+### Fixed
+
+- Kotlin's dependency removed from build jar - caused problems with http library.
+- A bug that caused connector to fail in case of schema with `union(null, record)`.
+
+## [1.8.1] - 2023-08-18
+
+### Added
+
+- `connect.ems.sink.put.timeout.ms` - property that is used connector to timeout long-running `put`.
+
+### Fixed
+
+- The blocking way of handling the implementation of `put` Sink interface replaced with non-blocking approach handled by internal supervisor that can fail connector in case of timeout. This prevents connector from getting into `zombie` state.
+
+## [1.8.0] - 2023-07-12
+
+### Changed
+
+- The default sizes of commit policy configuration properties and limits for them, so it plays better with EMS.
+
+## [1.7.2] - 2023-07-03
+
+### Changed
+
+- `connect.ems.parquet.write.flush.records` to `connect.ems.parquet.row.group.size.bytes`.
+
+### Fixed
+
+- The use of http client - now it is a singleton instead of instance per request.
+
+## [1.7.1] - 2023-06-27
+
+### Added
+
+- Brought back an option of having null as values of primary key fields by setting `connect.ems.allow.null.pk`.
+
+### Changed
+
+- `connect.ems.parquet.write.flush.records` now refers to bytes rather than records.
+
+### Fixed
+
+- Enriched the file name of the parquet file, so it has information about offsets, size and number of the rows.
+
+## [1.7.0] - 2023-06-23
+
+### Added
+
+- Option of handling Decimal type by converting it to double: `connector.ems.convert.decimals.to.double`.
+
+### Fixed
+
+- Major bug in Commit Policy that caused a connector to not send the files when it should.
+
+## [1.6.2] - 2023-06-12
+
+### Fixed
+
+- Json chunk flattening bugs.
+
+## [1.6.1] - 2023-05-16
+
+### Added
+
+- Contributor notes and docker-compose.
+
+### Fixed
+
+- A bug that caused connector to hang when there was a schema change.
+
+## [1.6.0] - 2023-05-08
+
+### Added
+
+- XML support.
+- Experimental in memory mode that does not use file system to create parquet files before sending them - `connect.ems.inmemfs.enable`.
+
+### Fixed
+
+- Minor bug with Kafka metadata.
+
+## [1.5.0] - 2023-03-14
+
+### Added
+
+- New configuration that when enabled will force connector to attach kafka metadata like offset, partition, kafkaTimestamp to parquet file - `connect.ems.embed.kafka.metadata`.
+- Primary keys null validation.
+
+### Fixed
+
+- A bug that caused connector to fail in case of null schemas.
+
+## [1.4.0] - 2023-01-30
+
+### Added
+
+- Flattener - connector now can handle non-flat Kafka messages. Following config was added: `connect.ems.flattener.enable`, `connect.ems.flattener.collections.discard`.
+- Flattener has now an option of creating JSON blobs for Kafka topics with more advanced nested structures by using `connect.ems.flattener.jsonblob.chunks`.
+
+## [1.3.4] - 2022-10-03
+
+### Fixed
+
+- Minor technical details about releases.
+
+## [1.3.3] - 2022-09-15
+
+### Added
+
+- Properties to control http client: `connect.ems.pool.max.idle`, `connect.ems.pool.keepalive`, `connect.ems.pool.explicit.close`.
+
+### Changed
+
+- Java version support changed from 8 to 11.
+
+## [1.3.2] - 2022-08-01
+
+### Changed
+
+- Contributor notes on release process.
+
+## [1.3.1] - 2022-06-06
+
+### Changed
+
+- `clientId` fixed to `CelonisKafka2Ems`.
+
+## [1.3.0] - 2022-06-02
+
+### Added
+
+- Support for `connect.ems.order.field.name` (`duplicateRemovalOrderColumn`) - so ingestion with Primary Key has an information on how to deduplicate rows. 
+
+### Changed
+
+- README.
+- Licensing.
+
+## [1.2.0] - 2022-05-26
+
+### Added
+
+- Support for proxy.
+- Obfuscation.
+- README.
+
+### Changed
+
+- General refactor.
+- Better test coverage.
+- Better parquet file handling.
+
+
+## [0.9.0] - 2022-01-26
+
+Initial version of Kafka EMS Connector.