Add 37 new entries and update 7 existing entries across 13 topic files.
Major contributions from agent-runtimes (K8s secrets, CI, Docker gotchas),
cluster-bootstrap (ArgoCD SSA, etcd tuning, DB migrations, Compose networking),
and cluster-apps/octopus-deploy (Helm vs raw manifests, ArgoCD source types).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Migrates 20 topic files from claude-foundations/best-practices/ to this
standalone repo. Adds BESTPRACTICES.md index, CLAUDE.md conventions, and
updated README.md. Container agents clone this repo to /best-practices.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
