chore: bump Helm chart to v1.19.1

[marcsanmi]

Summary

• Bumps Helm chart version from 1.19.0 to 1.19.1
• Includes regenerated rendered manifests and docs
• Follows up on feat(helm): support global.imageRegistry/global.image.registry #4866 (feat: support global.imageRegistry)

Test plan

• make helm/check passes — all rendered manifests valid
• make helm/docs passes — README up to date
• No functional changes, version bump only

🤖 Generated with Claude Code

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Note

Low Risk
Low risk version/metadata bump: updates chart and rendered manifest labels/checksums without changing application appVersion or runtime settings.

Overview
Bumps the pyroscope Helm chart version from 1.19.0 to 1.19.1 and updates the generated README version badge.

Regenerates the rendered Kubernetes manifests to reflect the new chart version (updates helm.sh/chart labels and resulting checksum/config annotations across deployments/statefulsets/HPAs).

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