chore: bump tooling and tidy the changelog

[masterjanic]

Two housekeeping commits that were sitting on main locally, moved onto a
branch because the default branch requires a pull request.

chore(deps): bump

Routine tooling bumps, all devDependencies — nothing the published package
resolves at runtime.

	from	to
packageManager	bun 1.4.1	bun 1.4.2
@biomejs/biome	2.5.12	2.5.14
@types/bun	1.4.1	1.4.2
lint-staged	17.4.1	17.5.1
turbo	2.10.12	2.10.13

Also picks up the matching turbo.json $schema bump and an issue-template
tweak.

chore: remove duplicates from changelog

Drops 54 duplicated lines from packages/api/CHANGELOG.md, left over from
folding the hand-written fork notes into the generated 2.0.0 entry.

Verification

check, typecheck, test, build, lint:package and docs:build all pass
locally against the updated lockfile.

Note

Both commits are chore:, so release-please will not open a release PR for
them — correct here, since nothing consumer-visible changed.

🤖 Generated with Claude Code