9f574d03e1
CLI tools and the logviewer UI need ClickHouse access without write or DDL rights. Adds a logreader user to the logs CHI mirroring the vector user mechanism: password sha256 hash sourced from a Vault-synced Secret, readonly profile, scoped to the logs database only. Credentials are seeded in Vault kv and synced by VSO, so no secret material lands in git.