fix(telemetry): report logs only once

[dmehala]

Description

Changes:

• Update telemetry API for logs to be consistent with metrics.
• Add test to validate logs are send in app-closing.

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-04-22 17:33:23

Comparing candidate commit e9a2fad in PR branch dmehala/fix/telemetry-logs with baseline commit 8f05ef9 in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 1 metrics, 0 unstable metrics.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 86.36364% with 3 lines in your changes missing coverage. Please review.

Project coverage is 87.09%. Comparing base (8f05ef9) to head (e9a2fad).

Files with missing lines	Patch %	Lines
src/datadog/telemetry/telemetry.cpp	0.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #207   +/-   ##
=======================================
  Coverage   87.09%   87.09%           
=======================================
  Files          80       80           
  Lines        5083     5084    +1     
=======================================
+ Hits         4427     4428    +1     
  Misses        656      656           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.