chore: Remove GenAI input truncation functions

[alexander-alderman-webb]

Description

Remove dead truncation code.
Both truncate_and_annotate_messages() and truncate_and_annotate_embedding_inputs() were only used in the static trace lifecycle. This lifecycle is dropped in the major.

Issues

Reminders

• Please add tests to validate your changes, and lint your code using uv run ruff.
• 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

[github-actions]

Codecov Results 📊

✅ 71053 passed | ⏭️ 3374 skipped | Total: 74427 | Pass Rate: 95.47% | Execution Time: 219m 9s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📉 -64609
Passed Tests	📉 -60852
Failed Tests	—
Skipped Tests	📉 -3757

All tests are passing successfully.

✅ Patch coverage is 100.00%. Project has 2240 uncovered lines.
❌ Project coverage is 90.14%. Comparing base (d0f63fb) to head (d6c5a55).

Files with missing lines (5)

File	Patch %	Lines
sentry_sdk/integrations/langchain.py	100.00%	⚠️ 4 partials
sentry_sdk/integrations/langgraph.py	100.00%	⚠️ 2 partials
sentry_sdk/integrations/litellm.py	100.00%	⚠️ 2 partials
sentry_sdk/integrations/openai_agents/spans/invoke_agent.py	100.00%	⚠️ 1 partials
sentry_sdk/integrations/openai_agents/utils.py	100.00%	⚠️ 1 partials

Coverage diff

@@            Coverage Diff             @@
##        master       #PR       +/-##
==========================================
- Coverage    90.20%    90.14%    -0.06%
==========================================
  Files          193       185        -8
  Lines        25788     22720     -3068
  Branches      9530      8268     -1262
==========================================
+ Hits         23261     20480     -2781
- Misses        2527      2240      -287
- Partials      1432      1337       -95

---

Generated by Codecov Action

[cursor]

Cursor Bugbot has reviewed your changes and found 2 potential issues.

^{❌ Bugbot Autofix is OFF. To automatically fix reported issues with cloud agents, enable autofix in the Cursor dashboard.}

^{Reviewed by Cursor Bugbot for commit c094138. Configure here.}

[sentrivana]

Beautiful!

LGTM, might be my #7449 will be superfluous after this.