chore: release v0.9.1

[randomm]

🤖 New release

• vipune: 0.9.0 -> 0.9.1 (✓ API compatible changes)

Changelog

[0.9.1] - 2026-08-20

Bug Fixes

• (fix: two test modules are orphaned and have never run — 44 tests silently disabled since #120 #173) De-duplicate orphaned test modules and guard against recurrence (#180)

Miscellaneous

• Hoist the query-vector norm out of the per-row cosine loop in Database::search (#184)
• Add a criterion benchmark harness for the Database::search path (#185)

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This PR was generated with release-plz.

[randomm]

⚠️ Do not merge as-is. The generated changelog in this PR is missing the fix(#173) entry (PR #180) — confirmed by log evidence, not just the PR diff.

Root cause identified in #155: filter_unconventional = true in cliff.toml combined with a git-cliff parse error silently drops the commit from the rendered changelog while still counting it toward the version bump.

Merging now would publish v0.9.1 to crates.io with an incomplete changelog — irreversible once published. Please hold until #155 lands a fix.

[randomm]

Update: the git_conventional parse-failure mechanism cited in the earlier warning here has been falsified by a controlled reproduction (see issue #155) — root cause investigation continues.

The practical warning is unchanged: this PR's generated changelog is still missing the fix(#173) entry. Do not merge as-is until the omission is resolved.

[randomm]

Restored the missing fix(#173) changelog entry by hand in fb3144a (docs: restore v0.9.1 changelog entry dropped by release-plz preprocessor bug (#155)).

Why: release-plz's default PR-link preprocessor corrupts type(#NNN): scoped commit headers before handing them to git-cliff, so commits with that header shape get silently dropped from the generated changelog. This is the same root cause as #155, and it previously bit the v0.9.0 release too (fix(#149) was dropped and hand-restored — see 7c7fab2 / #176). This time it dropped 7c80495 fix(#173): de-duplicate orphaned test modules and guard against recurrence (#180).

Also fixed a cosmetic truncation in the existing #184 entry ("...per-row cosine loop in Dat" → "...per-row cosine loop in Database::search") while in there, since it would otherwise ship in the published release notes verbatim.

The PR body has been updated to match the corrected CHANGELOG.md.

⚠️ Before merging: if any further commit lands on main before this PR is merged, release-plz will regenerate the changelog and drop this entry again. Re-check the ### Bug Fixes section for *(#173)* immediately before merging — do not assume this fix persists across a release-plz re-sync.

Underlying generator bug remains open (#155).