ref: Drop support for Django <2.0 in new major

[sentrivana]

Description

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 📊

✅ 89538 passed | ⏭️ 5428 skipped | Total: 94966 | Pass Rate: 94.28% | Execution Time: 327m 16s

📊 Comparison with Base Branch

Metric	Change
Total Tests	📉 -6836
Passed Tests	📉 -6025
Failed Tests	—
Skipped Tests	📉 -811

All tests are passing successfully.

✅ Patch coverage is 90.48%. Project has 2337 uncovered lines.
✅ Project coverage is 90.11%. Comparing base (base) to head (head).

Files with missing lines (1)

File	Patch %	Lines
sentry_sdk/integrations/django/transactions.py	71.43%	⚠️ 2 Missing

Coverage diff

@@            Coverage Diff             @@
##          main       #PR       +/-##
==========================================
+ Coverage    89.92%    90.11%    +0.19%
==========================================
  Files          193       186        -7
  Lines        24825     23621     -1204
  Branches      8912      8528      -384
==========================================
+ Hits         22321     21284     -1037
- Misses        2504      2337      -167
- Partials      1414      1366       -48

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Generated by Codecov Action

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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