fix: limit DB query result count in chunk and batch proposer

[Thegaram]

Purpose or design rationale of this PR

Describe your change. Make sure to answer these three questions: What does this PR do? Why does it do it? How does it do it?

Problem: If there are many "unchunked blocks" or "unbatched chunks" in DB, chunk-proposer or batch-proposer will become extremely slow, since it will try to read all entries into memory without limit. This might also lead to memory issues.

Solution: Limit the number of entries that we read in each DB query.

PR title

Your PR title must follow conventional commits (as we are doing squash merge for each PR), so it must start with one of the following types:

• fix: A bug fix

Deployment tag versioning

Has tag in common/version.go been updated?

• No, this PR doesn't involve a new deployment, git tag, docker image tag
• Yes

Breaking change label

Does this PR have the breaking-change label?

• No, this PR is not a breaking change
• Yes

[codecov]

Codecov Report

Merging #878 (8007f82) into develop (6631569) will decrease coverage by 0.10%.
The diff coverage is 33.33%.

❗ Current head 8007f82 differs from pull request most recent head 3a8ca75. Consider uploading reports for the commit 3a8ca75 to get more accurate results

@@             Coverage Diff             @@
##           develop     #878      +/-   ##
===========================================
- Coverage    51.28%   51.19%   -0.10%     
===========================================
  Files           60       60              
  Lines         5588     5602      +14     
===========================================
+ Hits          2866     2868       +2     
- Misses        2483     2491       +8     
- Partials       239      243       +4     

Flag	Coverage Δ
bridge	63.28% <33.33%> (-0.23%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
bridge/internal/config/config.go	68.42% <25.00%> (-31.58%)	⬇️
bridge/internal/orm/chunk.go	68.49% <25.00%> (-1.44%)	⬇️
bridge/internal/orm/l2_block.go	49.04% <25.00%> (-0.96%)	⬇️
...idge/internal/controller/watcher/batch_proposer.go	62.50% <100.00%> (ø)
...idge/internal/controller/watcher/chunk_proposer.go	67.85% <100.00%> (ø)