fix[notask]: add no and th to BERGAMOT_LANGUAGES enum

[RamazTs]

🎯 What problem does this PR solve?

• BERGAMOT_LANGUAGES enum in packages/sdk/schemas/translation-config.ts was missing "no" and "th" despite the registry shipping working model constants for both
• BERGAMOT_EN_NO, BERGAMOT_NO_EN, BERGAMOT_EN_TH, BERGAMOT_TH_EN resolve to real registry:// blobs (model + lex + vocab + metadata, dated 2026-04-28)
• But loadModel({ modelType: "nmt", modelConfig: { engine: "Bergamot", from: "en", to: "no" } }) (and the three sibling directions) was rejected with a zod invalid_union error at validation — four shipped pairs unreachable through the SDK

📝 How does it solve it?

• Add "no" and "th" to the BERGAMOT_LANGUAGES const tuple in their alphabetical slots
• Net diff: 2 lines added, no other changes; discriminated-union nmtConfigSchema now accepts the missing codes

🧪 How was it tested?

• bun run typecheck in packages/sdk — clean
• Surfaced by the QVAC-18959 SDK translation sanity-test suite (separate PR): under that suite, bergamot-en-no and bergamot-en-th consistently failed at the consumer's loadModel step with a zod invalid_union error pointing at modelConfig.from/to; every other bergamot pair loaded and translated fine. After this fix the 4 affected pairs (en-no, no-en, en-th, th-en) become usable through the SDK

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QVAC E2E — ios — ✅ all tests passed (82/94, 818s)

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QVAC E2E — android — ✅ all tests passed (84/94, 1662s)

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QVAC E2E — windows — ✅ all tests passed (94/94, 449s)

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QVAC E2E — linux — ✅ all tests passed (94/94, 349s)

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QVAC E2E — macos — ⚠️ no results

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[github-actions]

Tier-based Approval Status

**PR Tier:** TIER1

**Current Status:** ❌ PENDING

**Requirements:**
- 1 Team Member approval ❌ (0/1)
- 1 Team Lead OR Management approval ✅ (1/1)



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