fix(relayer): restart indexer and crawler when they exit due to failed API requests

[xiaodino]

Use https://relayer.katla.taiko.xyz/events?event=MessageSent&page=0&size=100&address=0x9e47FBb2a2A27B3b02E4a63b3eF5A3dC863c0223 as the example.

Before, the API response only returns 16 items. With the change, the API returns 19 items.

When a crawler is restarted, it will start from the last processing block height, rather than always from the genesis block.

[codecov]

Codecov Report

Attention: Patch coverage is 21.42857% with 22 lines in your changes are missing coverage. Please review.

❗ No coverage uploaded for pull request base (alpha-6@f416ffb). Click here to learn what that means.

Files	Patch %	Lines
packages/relayer/indexer/indexer.go	20.83%	16 Missing and 3 partials ⚠️
...er/indexer/set_initial_processing_block_by_mode.go	25.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             alpha-6   #16465   +/-   ##
==========================================
  Coverage           ?   26.85%           
==========================================
  Files              ?      102           
  Lines              ?     6117           
  Branches           ?        0           
==========================================
  Hits               ?     1643           
  Misses             ?     4298           
  Partials           ?      176           

Flag	Coverage Δ		*Carryforward flag
eventindexer	17.28% <ø> (?)		Carriedforward from c8da85b
guardian-prover-health-check	36.13% <ø> (?)		Carriedforward from c8da85b
relayer	37.35% <21.42%> (?)

*This pull request uses carry forward flags. Click here to find out more.

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