[DOP-22133] Implement increment for transfers with file sources

[IlyasDevelopment]

Change Summary

• Implemented FileDownloader for incremental transfer with FileModifiedTimeHWM, using a unique name composed of transfer.id, transfer.source_connection.name, and transfer.source_params.directory_path
• Before writing data to the target, added a check in HWMStore for existing HWM. If absent or strategy=full, FileDFWriter is initialized with if_exists="replace_overlapping_partitions" or if_exists="replace_entire_table" . Otherwise, if_exists="append" is used to prevent duplicates
• Wrapped the entire transfer logic (reading and writing) within the IncrementalStrategy() context
• Added worker configuration parameters for Horizon, including its URL, authentication credentials, and a custom namespace
• Added a container with Horizon
• Developed integration tests to verify incremental reading, first fetching all source data, then a new subset
• Used Strategy.increment_by=file_name with FileListHWM for FTP/FTPS

Checklist

• Commit message and PR title is comprehensive
• Keep the change as small as possible
• Unit and integration tests for the changes exist
• Tests pass on CI and coverage does not decrease
• Documentation reflects the changes where applicable
• docs/changelog/next_release/<pull request or issue id>.<change type>.rst file added describing change
  (see CONTRIBUTING.rst for details.)
• My PR is ready to review.

[codecov]

Codecov Report

Attention: Patch coverage is 92.18750% with 10 lines in your changes missing coverage. Please review.

Project coverage is 91.97%. Comparing base (c3473e0) to head (b9c0c72).
Report is 155 commits behind head on develop.

Files with missing lines	Patch %	Lines
syncmaster/worker/handlers/file/remote_df.py	85.18%	2 Missing and 2 partials ⚠️
syncmaster/dto/transfers_strategy.py	88.88%	1 Missing and 1 partial ⚠️
syncmaster/worker/handlers/db/clickhouse.py	33.33%	1 Missing and 1 partial ⚠️
syncmaster/dto/transfers.py	92.85%	0 Missing and 1 partial ⚠️
syncmaster/worker/handlers/file/local_df.py	88.88%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #209      +/-   ##
===========================================
+ Coverage    91.95%   91.97%   +0.01%     
===========================================
  Files          189      192       +3     
  Lines         4611     4695      +84     
  Branches       335      345      +10     
===========================================
+ Hits          4240     4318      +78     
- Misses         293      295       +2     
- Partials        78       82       +4     

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[dolfinus]

LGTM, but SFTP tests are failing, please check