Version bump + CHANGELOG finalization. Mirrors the established release-PR shape (#84): CHANGELOG + the three manifests + Cargo.lock, nothing else.

What's in this release

Python 0.7.0 → 0.7.1 — bug-fix release:

• bug: intra-batch duplicate IDs create orphaned vectors (langchain, agno) #90 — intra-batch duplicate ids no longer orphan vectors (LangChain, Haystack)
• bug: upsert deletes old data before validating new data — data loss on validation failure #89 — upsert no longer destroys existing data when the new batch fails validation (all four integrations)
• can not build on mac arm when simple run cargo build #92 — plain cargo build of the extension now links on macOS (source-build fix; prebuilt wheels were unaffected)

Rust crate 0.8.0 → 0.8.1 — no behavior change:

• Non-behavioral cleanup only (cleared 3 warnings, corrected stale SIMD doc comments). The published crate behaves identically to 0.8.0; re-released to keep crates.io in sync with the source tree.

Publish steps (after merge — maintainer)

Releases are tag-triggered:

• Push py-v0.7.1 → PyPI workflow
• Push v0.8.1 → crates.io workflow

I have not pushed any tags — that's the irreversible publish step and is left to you.

Notes

• No on-disk format change (still .tv / .tvim v3).
• cargo build -p turbovec -p turbovec-python compiles clean at the new versions; Cargo.lock updated to match.

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