chore: release 0.1.5

[isamu]

Summary

Patch release bundling the test-side `unknown` reduction series and the four upstream-PR cherry-picks merged since 0.1.4.

PR	Scope
#66	Tighten error-event listener signatures across `test/` (18 sites) + ring-buffer-null mock typing
#67	Replace `test/processor.test.ts` local mocks with `FfmpegCommandThis` directly; widen four public type declarations that were inaccurate (`'codecData'` variadic, `ScreenshotsConfig.timemarks/timestamps` mixed-array, `writeToStream`/`pipe`/`stream` accepting PipeOptions as first arg, `'error'` listener err typed as new exported `ReportingError`)
#68	Replace remaining test mock interfaces (`args` / `capabilities` / `duration-input` / `progress-consecutive` / `skip-metadata`) with `FfmpegCommandThis`; drop ~15 `as` casts
#69	Cherry-pick 4 upstream bug fixes — scientific notation in seek/duration argv (`fluent-ffmpeg#1131`), `-loglevel +level` progress event (`fluent-ffmpeg#928`), `filenames` event array copy (`fluent-ffmpeg#1017`), `codecData.audio_details`/`video_details` init (`fluent-ffmpeg#1301`)

Items to Confirm / Review

• Patch bump 0.1.4 → 0.1.5. All bug-fix changes are runtime-direction-of-correct-from-broken (per the project's 0.x convention; CHANGELOG header). The internal refactors are type-only and additive on the public surface (`ReportingError` / `PipeOptions` newly exported). The one consumer-visible note is the option-list internal representation for seek/duration args now uniformly stores `string` instead of preserving the input `number` — eventual ffmpeg argv unchanged, only callers that introspect `cmd._inputs[i].options.get()` and assert on element type see the difference. Documented in CHANGELOG-Fixed entry for fix: Prevent numbers in scientific notation from being passed to ffmpeg  fluent-ffmpeg/node-fluent-ffmpeg#1131.
• CHANGELOG date set to 2026-05-12.
• 502 tests passing (up from 492 at 0.1.4 — ten new regression tests cover the four cherry-picks).

Verification

• `yarn install` / `yarn typecheck` / `yarn lint` / `yarn build`: clean
• `yarn test`: 502 passing / 0 failing / 9 skipped

🤖 Generated with Claude Code