chore(deps): update henrygd/beszel-agent docker tag to v0.21.0

[renovate]

This PR contains the following updates:

Package	Update	Change
henrygd/beszel-agent	minor	0.20.0 → 0.21.0

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Release Notes

henrygd/beszel (henrygd/beszel-agent)

v0.21.0

Compare Source

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[anitrend]

OpenCode Dependabot Risk Review

Schema: local-stack.dependabot-risk.v1

Decision: APPROVE
Risk: LOW
Automerge allowed: true
Update type: semver-minor
Ecosystem: docker

Summary

Renovate PR updates the henrygd/beszel-agent Docker image from 0.20.0 to 0.21.0 (semver minor) in beszel/docker-compose.yml and the matching generated stacks/observability.yml. The generated stack change is a one-line image tag bump that exactly mirrors the source Compose change, so no stack/source drift is introduced. The beszel-agent is a lightweight metrics collector and is not a stateful service on the scrutiny list; the beszel hub is already pinned at 0.21.0, so this update keeps agent and hub versions aligned. v0.21.0 release notes contain only feature additions and fixes with no breaking changes or config migration requirements. No workflow, secret, stack-rendering, or deployment files are touched.

Changed runtime artifacts

Image / dependency	From	To	Risk note
henrygd/beszel-agent	0.20.0	0.21.0	minor update; release notes checked (v0.21.0); feature additions and fixes only, no breaking config migration found; hub already at 0.21.0 so agent/hub versions stay aligned

Runtime impact

Expected rolling service update of the beszel-agent container only; no stateful data migration, no gateway/proxy config impact.

Breaking change assessment

No breaking changes found in checked release notes for beszel v0.21.0; changes are feature additions and bug fixes only.

Required checks

• ./stackctl.sh sync
• ./stackctl.sh up --dry-run --no-logs

Manual follow-up

None

Sources checked

• Dependabot metadata
• PR diff
• GitHub release notes for henrygd/beszel v0.21.0
• Repo source files (beszel/docker-compose.yml, stacks/observability.yml)

[anitrend]

OpenCode risk gate: low risk detected. Update type: semver-minor. Ecosystem: docker.

[anitrend]

OpenCode risk gate: second approval for auto-merge.

[anitrend]

OpenCode risk gate: low risk detected. Update type: semver-minor. Ecosystem: docker.

[anitrend]

OpenCode risk gate: second approval for auto-merge.