fix: add start and end timestamp to counts api response

[nikhilsinhaparseable]

new structure of records in response json to /counts api

{
            "counts_start_timestamp": "2025-01-16T17:34:00+00:00",
            "counts_end_timestamp": "2025-01-16T17:47:00+00:00",
            "log_count": 4203450
        }

[coveralls]

Pull Request Test Coverage Report for Build 12823168927

Details

• 0 of 11 (0.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.004%) to 12.771%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/handlers/http/query.rs	0	5	0.0%
src/query/mod.rs	0	6	0.0%

Totals
Change from base Build 12814366908:	-0.004%
Covered Lines:	2459
Relevant Lines:	19255

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💛 - Coveralls