Sync develop → main for v1.9.0 chart release (installer first-run UX + ingestor default 0.5 + fixes)

[saadqbal]

Sync develop → main to cut the v1.9.0 client chart release.

What ships in v1.9.0 (since v1.8.5)

• feat(installer): first-run UX — interim slice of the v2 spec (feat(installer): first-run UX — interim slice of the v2 spec (copy, naming, location fix, clearer errors) #307)
• fix(chart): default ingestor tag 0.3 → 0.5 (fix(chart): bump default ingestor tag 0.3 → 0.5 #314); inject proxyEnv into resource-monitor DaemonSet (fix(chart): inject proxyEnv into the resource-monitor DaemonSet #312)
• fix(installer): configurable training size at install (fix(installer): make the training size configurable at install (TRACEBLOC_TRAINING_RESOURCES) #308); harden provision location + client-detect guards (fix(installer): harden provision location + client-detect guards (#309 bugbot) #315)
• fix(tests): ×4 (e2e-journey guards/timeouts, path-persist signal, Step-4 data validate); cross-repo fresh-shell E2E harness (test: cross-repo fresh-shell last-mile E2E harness (install -> CLI -> cluster info -> push) #214)
• ci(helm): drop redundant schema job; rename colliding test jobs (ci(helm): drop redundant schema job + fix Lint/Unit tests name collision #280)
• chore(chart): bump client 1.8.5 → 1.9.0 (version + appVersion, chore(chart): bump client 1.8.5 → 1.9.0 (version + appVersion) #320)

After merge

Publish a GitHub Release tagged v1.9.0 on main → release workflow packages the chart from the tag to gh-pages; fleet auto-upgrade flips at :23.

Tracked by #319.

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Note

Low Risk
Chart metadata version bump only; no runtime or template changes in this diff.

Overview
Cuts the v1.9.0 client Helm release by bumping version and appVersion in client/Chart.yaml from 1.8.5 to 1.9.0.

No chart templates or values change in this diff—only the release metadata so main can be tagged and published for fleet auto-upgrade.

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