feat: add metrics to service

[gusinacio]

Close #274
Close #4

[github-actions]

Pull Request Test Coverage Report for Build 11107661730

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 13 of 150 (8.67%) changed or added relevant lines in 4 files are covered.
• 72 unchanged lines in 5 files lost coverage.
• Overall coverage increased (+0.9%) to 69.136%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
common/src/indexer_service/http/indexer_service.rs	0	23	0.0%
service/src/routes/cost.rs	0	34	0.0%
common/src/indexer_service/http/request_handler.rs	0	80	0.0%

Files with Coverage Reduction	New Missed Lines	%
common/src/tap/checks/deny_list_check.rs	1	98.21%
common/src/indexer_service/http/indexer_service.rs	1	0.0%
service/src/routes/cost.rs	1	0.0%
common/src/indexer_service/http/request_handler.rs	32	0.0%
tap-agent/src/agent/sender_allocation.rs	37	90.21%

Totals
Change from base Build 10948463940:	0.9%
Covered Lines:	4218
Relevant Lines:	6101

---

💛 - Coveralls

[carlosvdr]

LGTM

[gusinacio]

Some indexers would like to have the error information on their metrics. This means bringing back error codes mapping. This could be on a following PR depending on priorities for having this kind of metric.

[gusinacio]

We got a thumbs up from indexers who are testing this PR on their production environment.