feat(log-query): implement pagination with limit and offset parameters

[waynexia]

I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

What's changed and what's your intention?

Implement pagination with limit and offset parameters. A similar use case in Elasticsearch is /my-index-000001/_search?from=40&size=20

This is a breaking change but since log-query is highly experimental I only categorize it as a normal change.

PR Checklist

Please convert it to a draft if some of the following conditions are not met.

• I have written the necessary rustdoc comments.
• I have added the necessary unit tests and integration tests.
• This PR requires documentation updates.
• API changes are backward compatible.
• Schema or data changes are backward compatible.

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Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

Comments suppressed due to low confidence (3)

src/query/src/log_query/planner.rs:97

• Ensure that the default value for skip is tested when it is None.

query.limit.skip.unwrap_or(0),

src/query/src/log_query/planner.rs:98

• Ensure that the default value for fetch is tested when it is None.

Some(query.limit.fetch.unwrap_or(DEFAULT_LIMIT)),

src/log-query/src/log_query.rs:271

• [nitpick] The struct name 'Limit' is too generic and could cause confusion. It should be renamed to 'PaginationLimit'.

pub struct Limit {

[codecov]

Codecov Report

Attention: Patch coverage is 97.22222% with 2 lines in your changes missing coverage. Please review.

Project coverage is 83.71%. Comparing base (7471f55) to head (5c0c4e9).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5241      +/-   ##
==========================================
- Coverage   83.94%   83.71%   -0.23%     
==========================================
  Files        1198     1198              
  Lines      222969   223038      +69     
==========================================
- Hits       187177   186724     -453     
- Misses      35792    36314     +522