Feat: move database vacuum to aggregator startup to avoid API interruptions during epoch transitions

[dlachaume]

Content

This PR includes a fix for the API unavailability during epoch transitions by moving database vacuum operation from the upkeep service to aggregator startup.

The main changes are:

• Removed vacuum operation from the epoch transition process
• Created a VacuumTracker utility that tracks when the last vacuum operation was performed
• Added a controlled vacuum process at aggregator startup with a minimum interval (1 week)
• Added a clap command to execute vacuum manually

Pre-submit checklist

• Branch
  • Tests are provided (if possible)
  • Crates versions are updated (if relevant)
  • CHANGELOG file is updated (if relevant)
  • Commit sequence broadly makes sense
  • Key commits have useful messages
• PR
  • All check jobs of the CI have succeeded
  • Self-reviewed the diff
  • Useful pull request description
  • Reviewer requested
• Documentation
  • Update README file (if relevant)
  • Update documentation website (if relevant)
  • Add dev blog post (if relevant)
  • Add ADR blog post or Dev ADR entry (if relevant)
  • No new TODOs introduced

Issue(s)

Closes #2364

[github-actions]

Test Results

    3 files  ±0     56 suites  ±0   11m 42s ⏱️ +5s
1 765 tests +8  1 765 ✅ +8  0 💤 ±0  0 ❌ ±0 
2 163 runs  +8  2 163 ✅ +8  0 💤 ±0  0 ❌ ±0 

Results for commit 8730458. ± Comparison against base commit 53e6d45.

♻️ This comment has been updated with latest results.

[sfauvel]

LGTM

[jpraynaud]

LGTM 👍