chore: Update prod helm to sha containing remove percentage

[spoonman01]

No description provided.

[claude]

Review — chore: Update prod helm to sha containing remove percentage

Summary: Single-line bump of the prod image tag in helm/pollapp/values-prod.yaml from sha-9a03ad7 to sha-5c7f84a. Scope is appropriately small and matches the PR title/intent.

What is good

• Immutable SHA pinning. Pinning to a sha-* tag (rather than a mutable tag like latest, which values.yaml uses for the default) is the right call for prod — reproducible, auditable deploys.
• Change is isolated to the prod values override; no unrelated edits.

Worth confirming before merge

• Verify the target image exists and was tested. The commit 5c7f84a is not reachable from this repo checkout, so I could not confirm from here that quay.io/wire/poll-app:sha-5c7f84a was actually built/pushed and contains the intended "remove percentage" change. Please double-check the image is present in Quay and passed CI before this rolls to prod.
• Traceability. This PR has no description — consider adding a one-line note linking the source PR/commit that removed the percentage. Makes the prod rollout easier to audit and roll back later.

Minor / out of scope

• The file header notes this config should eventually move to the argocd-integrations repo. Not this PR job, but this manual tag-bump toil is exactly what ArgoCD image automation would remove — worth prioritizing that migration.

Other dimensions

• Bugs / performance / security: none introduced — config value change only, no code, secrets, or resource impact.
• Tests: N/A for a Helm value bump.

Overall this looks fine to merge once the target image is confirmed built and validated.