chore: release v0.2.2

[lostmygithubaccount]

Patch release — 6 merged PRs since v0.2.1 (2026-04-05). Hardening only: SSE robustness, retry jitter, streaming timeout, buffer limit, Python error tagging. No API breaks → patch level.

Merged since v0.2.1

Hardening (SSE + streaming + retry):

• fix(client): robustness improvements for retry, streaming #14 fix(client): add retry jitter, expand retryable status codes, streaming timeout, buffer limit
• fix(client): handle \r\n SSE line endings, release GIL in Python #15 fix(client): handle \r\n SSE line endings, release GIL in Python
• fix(completions): include model field in API request body #16 fix(completions): include model field in API request body
• test(client): add coverage for SSE edge cases and retry #17 test(client): add coverage for SSE edge cases and retry
• fix(py): prefix error messages with variant tag #18 fix(py): prefix Python error messages with variant tag for pattern matching

Refactor:

• refactor(client): remove unnecessary allocations in SSE parsing #13 refactor(client): remove unnecessary allocations in SSE parsing

Why patch

All changes are bug fixes, tests, or internal refactors. No new public API surface, no removed/renamed items, no behavior change beyond fixing correctness + resilience.

Gate

./bin/check green (rust + python).

DO NOT MERGE — agent0 drives merges + tags + publish.

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