feat(chart): support runtimeClassName and schedulerName in Reloader deployment

[somaz94]

Adds runtimeClassName and schedulerName support to the Reloader deployment pod spec, matching the existing scheduling knobs (nodeSelector, affinity, tolerations, topologySpreadConstraints, priorityClassName). Both default to empty and render only when set, so behavior is unchanged for existing users.

Validation:

• helm unittest: 13 passed (9 existing + 4 new, covering set + default-omitted for both fields)
• helm template: both fields absent by default, rendered correctly when set
• helm lint: 0 failed
• Chart.yaml bumped 2.2.14 -> 2.2.15

[somaz94]

Merged master in to clear the conflict — this is mergeable again.

@msafwankarim sorry, this dismissed your approval: the repo re-requests review on push, so your 2026-08-04 sign-off is gone even though nothing in the feature changed. The only alternative was leaving it conflicted and unmergeable, so I took the trade. The feature diff is byte-identical to what you approved — everything below is merge resolution only.

Two things worth calling out in the resolution, since both would have been silent regressions:

• appVersion conflicted and I took master's v1.4.20. My branch still carried v1.4.19 from when it was opened, so resolving in favour of "mine" would have quietly rolled the app version back inside Chart.yaml.
• version was 2.2.15 on both sides — master released 2.2.15 in the meantime, so my original bump was overtaken and would have collided. Re-bumped to 2.2.16.

Net effect on Chart.yaml is now a single line: 2.2.15 → 2.2.16. Nothing else in the merge touched the feature.

helm lint clean and helm unittest green (45 tests, 2 suites) against the merged tree. Nothing else owed from my side.

Two side effects of the push worth naming, both outside my control: the chart workflow for this head sha is sitting at action_required so CI hasn't started (the check list reads empty rather than failing), and the approval above was auto-dismissed. Both need a maintainer click — happy to do anything else that helps.