Bump wire-server to 5.25.0 and fix background-worker PostgreSQL config

[sghosh23]

Summary

• Cherry-picks wire-builds bump to 5.25.0 from PR Update wire-builds #843 (commit aa181b84)
• Adds missing background-worker PostgreSQL configuration and secret sync

Changes

1. offline/tasks/proc_pull_charts.sh

Cherry-picked from #843 — updates wire-builds reference to 5.25.0 (5a74084).

2. bin/offline-helm.sh

Adds .background-worker.secrets.pgPassword to sync_pg_secrets(). The function previously synced PostgreSQL passwords only to brig, galley, spar, and gundeck — but background-worker has required pgPassword since Chart 5.24.0.

3. values/wire-server/prod-values.example.yaml

• background-worker: Adds postgresql connection config (host, port, user, dbname) and explicit postgresMigration.conversation: cassandra
• galley: Adds explicit postgresMigration.conversation: cassandra

⚠️ Critical Note: background-worker default bug at 5.25.0

At Chart 5.25.0, the background-worker Helm chart incorrectly defaults postgresMigration.conversation to postgresql instead of cassandra (fixed in 5.26.0). Without the explicit override added in this PR:

• User Group → Channel sync background jobs read conversations from PostgreSQL (where they don't exist yet)
• Jobs get Nothing and silently skip member synchronization
• No crash or error — just silent data inconsistency

This PR adds the explicit cassandra override as a workaround.

Related

• Supersedes the wire-builds portion of Update wire-builds #843
• Addresses background-worker PostgreSQL gap discovered during 5.5→5.25 migration planning

[sghosh23]

Note on prod-values.example.yaml for 5.25.0: please keep the example.com placeholders (e.g., federationDomain, conversationCodeURI, deeplink endpoints) and do not replace them in this PR. These must be configured per deployment/host, so the file should remain a template with example values and guidance instead of hardcoding a specific domain.

[sonarqubecloud]

Quality Gate failed

Failed conditions
3.1% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud