fix(pipeline): don't restart run_loop future on tip change

[kariy]

Currently the select! is configured in Pipeline::run to completes on the command waiting regardless of what command is received. This means the self.run_loop() future will be cancelled even if it's a command for changing the pipeline's tip - the pipeline has to process the same batch again.

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.33%. Comparing base (9bde0ae) to head (237ef33).
⚠️ Report is 190 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/sync/pipeline/src/lib.rs	80.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             main     #368     +/-   ##
=========================================
  Coverage   73.32%   73.33%             
=========================================
  Files         209      256     +47     
  Lines       23132    32324   +9192     
=========================================
+ Hits        16961    23704   +6743     
- Misses       6171     8620   +2449     

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