stabilize Nextcloud: relax probes, reduce resources for 2-client SQLite workload
SQLite locks cause slow responses under concurrent access, triggering
liveness probe failures and restarts. With only 2 sync clients:
- Liveness: period 30→60s, timeout 10→30s, failures 6→10 (tolerates 10min)
- Readiness: period 30→60s, timeout 10→30s, failures 3→5
- Startup: timeout 10→30s
- Resources: CPU 16→4, memory 6Gi→3Gi (10 workers × 200MB = 2GB max)
[ci skip]
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>