Add MiniMax M3 to regional provider presets

[octo-patch]

Summary

• Add MiniMax-M3 to both MiniMax CN and Global provider presets.
• Record the current M3 and M2.7 capability metadata supported by the catalog.

Root cause

The catalog exposed M3 only in the Global preset and did not carry complete capability metadata for the two supported models across both regions.

Changes

• Add M3 to both regional presets while keeping M2.7 as the default alias.
• Record context, reasoning, tool use, vision, and adaptive thinking capabilities where supported.
• Add request-capture coverage for the regional Anthropic and OpenAI endpoint paths.
• Add regression coverage for regional preset URLs, model aliases, and capabilities.

Tests

• npx --yes --package=node@22 node node_modules/tsx/dist/cli.mjs --test --import ./src/__tests__/db-isolation.setup.ts src/__tests__/unit/minimax-provider.test.ts src/__tests__/unit/provider-preset.test.ts src/__tests__/unit/provider-resolver.test.ts src/__tests__/unit/provider-request-shape.test.ts src/__tests__/unit/openai-compatible-provider.test.ts
• npx --yes --package=node@22 npm run test (3,843 tests passed)

Screenshots / logs

N/A. This is a provider catalog and unit-test change.

Checklist

• No i18n changes.
• No database changes.
• No shared type changes.
• No documentation changes required.
• Full typecheck and unit-test suite passed.

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