Londiste

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* shard handler: support filtered copy, load settings from config file:
``shard_hash_func``, ``shard_info_sql``.
* fix: always call handler's ``prepare_batch``.

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* Fix write_hook in parallel copy.

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* Parallel single table copy:

- threaded_copy_tables - list of glob patterns for table names
- threaded_copy_pool_size - number of threads

* Various linter fixes

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* Fix fkey log message
* Upgrade Skytools dependency in tox to get copy_from fix
* Various linter fixes

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* obfuscate: process copy events
* Various linter fixes
* Docker tests

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* obfuscate: Improved decoding/encoding handling
* Setup Github Actions
* Code cleanups
* Drop Debian packaging