fix(ups): convert estimatedRuntime from minutes to seconds (#1822)

## Summary

Fixes the `estimatedRuntime` field in the UPS GraphQL query to return
values in **seconds** as documented, instead of **minutes**.

## Problem

The `TIMELEFT` value from `apcupsd` is returned in minutes (e.g., `6.0`
for 6 minutes), but the GraphQL schema documentation states:

> Estimated runtime remaining on battery power. **Unit: seconds**.
Example: 3600 means 1 hour of runtime remaining

Currently, the API returns `6` (minutes) instead of `360` (seconds).

## Solution

Convert the `TIMELEFT` value from minutes to seconds by multiplying by
60:

```typescript
// Before
estimatedRuntime: parseInt(upsData.TIMELEFT || '3600', 10),

// After
estimatedRuntime: Math.round(parseFloat(upsData.TIMELEFT || '60') * 60),
```

## Testing

1. Query `upsDevices` before the fix → `estimatedRuntime: 6` (incorrect
- minutes)
2. Query `upsDevices` after the fix → `estimatedRuntime: 360` (correct -
seconds)

Tested on Unraid server with APC UPS connected via apcupsd.

## Related Issues

Fixes #1821

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Bug Fixes**
* Corrected UPS battery runtime calculation to interpret provider
TIMELEFT as minutes, convert to seconds, and use a sensible default when
missing—improves displayed battery runtime accuracy.
* **Tests**
* Updated UPS test fixtures to match the minute-based TIMELEFT format
used by the UPS provider.

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settings.</sub>
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

api/src/unraid-api/graph/resolvers/ups/ups.resolver.spec.ts

@@ -22,7 +22,7 @@ describe('UPSResolver', () => {
         MODEL: 'Test UPS',
         STATUS: 'Online',
         BCHARGE: '100',
-        TIMELEFT: '3600',
+        TIMELEFT: '60', // 60 minutes (apcupsd format)
         LINEV: '120.5',
         OUTPUTV: '120.5',
         LOADPCT: '25',

api/src/unraid-api/graph/resolvers/ups/ups.resolver.ts

@@ -21,7 +21,8 @@ export class UPSResolver {
             status: upsData.STATUS || 'Online',
             battery: {
                 chargeLevel: parseInt(upsData.BCHARGE || '100', 10),
-                estimatedRuntime: parseInt(upsData.TIMELEFT || '3600', 10),
+                // Convert TIMELEFT from minutes (apcupsd format) to seconds
+                estimatedRuntime: Math.round(parseFloat(upsData.TIMELEFT || '60') * 60),
                 health: 'Good',
             },
             power: {