[CRCR] Show Healthy/Degraded health status on CRCR summary page (#8366)

## Summary

Replaces raw pass-rate percentages with semantic health labels on the
CRCR summary page (`/crcr`):

- **Healthy**: displayed when pass rate = 100%
- **Degraded**: displayed when pass rate < 100%

### Changes

- **CRCR Relay Health card**: Shows "Healthy" or "Degraded" prominently,
with the actual percentage and job counts as sub-labels. Border color
uses green (healthy) or orange (degraded) instead of the previous
green/red threshold.
- **Per-repo tables**: Added a dedicated "Health" column with
Healthy/Degraded chips alongside the existing numeric "Pass Rate"
column.
- Health threshold simplified: 100% = Healthy, anything below = Degraded
(per sync meeting action item).

### Mockup

Live mockup:
https://subinz1.github.io/CRCR/mockups/oot-hud-mockup-crcr-summary.html

Fixes #8306

## Test plan

- [ ] Verify CRCR summary page loads without errors
- [ ] Verify the health card shows "Healthy" when crcr-test pass rate is
100%
- [ ] Verify the health card shows "Degraded" with orange border when <
100%
- [ ] Verify per-repo table "Health" column shows correct
Healthy/Degraded chips
- [ ] Verify numeric "Pass Rate" column still shows accurate percentages

Author: subinz1

torchci/pages/crcr/index.tsx

@@ -309,9 +309,10 @@ function CrcrTestHealthCard({
   metrics: CiMetricsRow | undefined;
 }) {
   if (!metrics) return null;
-  const rate = (metrics.pass_rate * 100).toFixed(1) + "%";
-  const isHealthy = metrics.pass_rate >= 0.95;
-  const borderColor = isHealthy ? "#2e7d32" : "#d32f2f";
+  const pct = (metrics.pass_rate * 100).toFixed(1) + "%";
+  const isHealthy = metrics.pass_rate >= 1.0;
+  const borderColor = isHealthy ? "#2e7d32" : "#ed6c02";
+  const label = isHealthy ? "Healthy" : "Degraded";
   return (
     <NextLink href="/crcr/pytorch/crcr-test" passHref legacyBehavior>
       <Paper
@@ -330,13 +331,13 @@ function CrcrTestHealthCard({
         }}
       >
         <Typography variant="caption" color="text.secondary">
-          CRCR-test Pass Rate
+          CRCR Relay Health
         </Typography>
         <Typography variant="h5" sx={{ fontWeight: 600, color: borderColor }}>
-          {rate}
+          {label}
         </Typography>
         <Typography variant="caption" color="text.secondary">
-          {metrics.successes}/{metrics.total} jobs passed &middot;
+          {pct} · {metrics.successes}/{metrics.total} jobs passed ·
           pytorch/crcr-test
         </Typography>
       </Paper>