feat(chart): dashboard Job picker defaults to All + Go runtime panels

[ynsta]

Summary

Two related dashboard improvements, packaged as a single chart bump
1.9.2 → 1.9.3.

1. Job picker now defaults to All

The Job template variable previously had no default, so opening the
dashboard could show "No data" until a user manually picked a job. Now:

• includeAll: true
• allValue: ".*s3proxy.*"
• current: { text: "All", value: "$__all" }
• Template regex: /s3proxy/ restricts the dropdown to jobs whose name
  contains s3proxy.

Effect: dashboard opens populated on multi-release clusters; the
dropdown only lists relevant jobs.

2. New Runtime (Go) row

Six panels backed by the default client_golang collectors that
s3proxy already registers (collectors.NewGoCollector +
NewProcessCollector in s3proxy/internal/monitoring/monitoring.go):

Panel	Metric
CPU usage (cores)	rate(process_cpu_seconds_total[2m])
Resident memory (RSS)	process_resident_memory_bytes
Go heap in use	go_memstats_heap_inuse_bytes, _heap_alloc_bytes
Goroutines	go_goroutines
GC pause (p50/p95/p99)	go_gc_duration_seconds{quantile=…}
Open file descriptors	process_open_fds

All scoped on job=~"$job", instance=~"$instance" so the existing
pickers apply. No app code change — these metrics already ship.

See CHANGELOG.md → Chart / 1.9.3.

Test plan

• jq . charts/s3proxy/dashboards/s3proxy.json >/dev/null — valid JSON
• helm lint charts/s3proxy — passes
• Render hits the new defaults exactly once:

  helm template t charts/s3proxy --set grafanaDashboard.enabled=true \
    --show-only templates/grafana-dashboard.yaml \
    | grep -E '"allValue": "\.\*s3proxy\.\*"'
  

  → 1
• Render exposes all six new runtime metric names (8 matches across
  panel targets).
• Render keeps job=~"$job" filtering everywhere (20 hits) and has
  zero stale service="s3proxy" filters.
• Open the dashboard on the bug-reporting cluster; confirm panels
  populate without touching the picker and the Runtime row renders.
• CI green on chart/dashboard-job-default-allmatch.

Release flow

Merge → tag chart-v1.9.3 on main → CI publishes
ghcr.io/intrinsec/s3proxy/charts/s3proxy:1.9.3.

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