fix: Add hard limit to log batcher

[alexander-alderman-webb]

Description

Introduce a hard limit on the number of elements in the log batcher. The size constraint prevents the log batcher from using too much memory.

Issues

Reminders

• Please add tests to validate your changes, and lint your code using tox -e linters.
• Add GH Issue ID & Linear ID (if applicable)
• PR title should use conventional commit style (feat:, fix:, ref:, meta:)
• For external contributors: CONTRIBUTING.md, Sentry SDK development docs, Discord community

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.97%. Comparing base (faa327c) to head (83e206a).
⚠️ Report is 1 commits behind head on master.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5069   +/-   ##
=======================================
  Coverage   83.96%   83.97%           
=======================================
  Files         179      179           
  Lines       17943    17948    +5     
  Branches     3192     3193    +1     
=======================================
+ Hits        15066    15071    +5     
  Misses       1905     1905           
  Partials      972      972           

Files with missing lines	Coverage Δ
sentry_sdk/_log_batcher.py	80.68% <100.00%> (+1.16%)	⬆️
sentry_sdk/client.py	83.80% <100.00%> (ø)