feat: enhance online migration with auto-creation and cleanup of publications and slots

[isdaniel]

• Added support for auto-creating publications during online migration if they do not exist.
• Implemented cleanup of auto-created publications and replication slots after successful cutover.
• Introduced CLI flags to control the auto-creation of publications and retention of replication slots.
• Updated documentation to reflect changes in migration phases and resource management.
• Added integration tests to verify the lifecycle of publications and slots during online migrations.
• implement auto-creation and cleanup of publications and replication slots

[codecov]

Codecov Report

❌ Patch coverage is 89.45233% with 52 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.44%. Comparing base (442e188) to head (bded15f).

Files with missing lines	Patch %	Lines
pg_dbmigrator/src/orchestrator.rs	40.50%	47 Missing ⚠️
pg_dbmigrator/src/dump.rs	81.81%	4 Missing ⚠️
pg_dbmigrator/src/preflight.rs	99.60%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #7      +/-   ##
==========================================
+ Coverage   90.22%   90.44%   +0.22%     
==========================================
  Files          16       16              
  Lines        5154     5633     +479     
==========================================
+ Hits         4650     5095     +445     
- Misses        504      538      +34     

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[gemini-code-assist]

Code Review

This pull request implements automated lifecycle management for PostgreSQL replication resources, enabling the auto-creation of publications and the post-cutover cleanup of publications and replication slots. It introduces new CLI flags, --no-auto-create-publication and --keep-slot, and improves progress reporting by tracking table-level updates from pg_dump. The changes also include a major update to the development documentation and expanded integration testing. Feedback was provided to optimize the cleanup process by making the replication slot drop conditional on a successful wait for inactivity.