feat(FR-2494): add Strawberry AutoScalingRuleEditorModal with single/range mode and Prometheus preset (#6641)

Resolves #6485 (FR-2494)

> [!NOTE]
> Translation is handled in #6642

## Summary

- Add `AutoScalingRuleEditorModal.tsx` (Strawberry API, >=26.4.0) with:
    - Segmented single/range condition mode toggle
    - Single mode: direction selector (Upper sets `maxThreshold`, Lower sets `minThreshold`)
    - Range mode: both `minThreshold` + `maxThreshold` with validation (min >= max shows error)
    - Metric source dropdown with KERNEL, INFERENCE_FRAMEWORK, PROMETHEUS options
    - Prometheus preset selection: auto-fills `metricName`, shows `queryTemplate` read-only, auto-applies `timeWindow`
    - `prometheusQueryPresetId` stored as raw UUID via `toLocalId(globalId)`
    - Strawberry `createAutoScalingRule` / `updateAutoScalingRule` mutations
- Wire `AutoScalingRuleEditorModal` into `AutoScalingRuleList.tsx` (create + edit flows)
- Add i18n keys for new UI elements (Single, Range, Upper, Lower, QueryTemplate, validation messages, etc.)

## Verification

```
=== Relay: PASS ===
=== Lint: PASS ===
=== Format: PASS ===
=== TypeScript: PASS ===
=== ALL PASS ===
```

Author: agatha197