QVAC-16464 feat[api]: update SDK nmtcpp plugin for @qvac/translation-nmtcpp 2.0.1

[RamazTs]

What problem does this PR solve?

The @qvac/translation-nmtcpp addon was migrated to v2.0.1, removing the loader/WeightsProvider abstraction. The addon now takes a files object with resolved file paths instead of loader/diskPath/modelName. The SDK NMT plugin was still using the old 1.x interface and couldn't work with the new addon.

Additionally, the SDK's model-registry.ts imported BaseInference from @qvac/infer-base to define AnyModel, which caused SDK-wide type resolution failures when the new addon's dependency on @qvac/infer-base@^0.4.0 conflicted with other addons' versions.

How does it solve it?

NMT plugin migration (nmtcpp-translation/plugin.ts):

• Removed FilesystemDL, asLoader, parseModelPath, Loader type
• Build files object from resolved artifact paths (model, vocabs, pivot)
• Pivot config moved from bergamotPivotModel (with loader/paths) to config.pivotConfig (generation params only) + files.pivotModel/pivotSrcVocab/pivotDstVocab
• Single-arg constructor: new TranslationNmtcpp({ files, params, config, logger, opts })
• Returns loader: null (full PluginModelResult.loader removal deferred to after all addons migrate)

SDK type cleanup (model-registry.ts):

• Removed BaseInference import from @qvac/infer-base — eliminates the SDK's only direct dependency on that package
• AnyModel is now a standalone interface with only what the registry/ops layer uses: load(), run(), unload?(), reload?()
• PluginModel (schemas) stays minimal: load(), unload?() — the plugin contract

Dependency bump (package.json):

• @qvac/translation-nmtcpp: ^0.6.1 → ^2.0.1

New API

// NMT addon constructor (2.0.1) — called by SDK plugin
new TranslationNmtcpp({
  files: {
    model: '/path/to/model.bin',
    srcVocab: '/path/to/vocab.spm',
    dstVocab: '/path/to/vocab.spm',
    pivotModel: '/path/to/pivot.bin',       // optional
    pivotSrcVocab: '/path/to/pivot-vocab.spm', // optional
    pivotDstVocab: '/path/to/pivot-vocab.spm', // optional
  },
  params: { srcLang: 'en', dstLang: 'fr' },
  config: {
    modelType: TranslationNmtcpp.ModelTypes.Bergamot,
    beamsize: 4,
    pivotConfig: { beamsize: 4, topk: 100 }, // optional
  },
  logger,
  opts: { stats: true },
})

How was it tested?

• bun run build — clean
• bun run lint — clean (eslint + tsc)
• bun run test:unit — all pass
• bun run bare:example examples/translation/translation-bergamot.ts — EN→FR ✅
• bun run bare:example examples/translation/translation-bergamot-batch.ts — batch 4 texts ✅
• bun run bare:example examples/translation/translation-bergamot-pivot.ts — ES→EN→IT pivot ✅
• bun run bare:example examples/translation/translation-indic.ts — EN→HI IndicTrans ✅

[github-actions]

Tier-based Approval Status

**PR Tier:** TIER1

**Current Status:** ✅ APPROVED

**Requirements:**
- 1 Team Member approval ✅ (1/1)
- 1 Team Lead OR Management approval ✅ (1/1)



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*This comment is automatically updated when reviews change.*

[gianni-cor]

also remove any change not related to translation addon. those will be addressed by other teams

[RamazTs]

/review