devlog 006: building a relay in zig — zlay architecture, deployment war stories (musl/glibc, TCP splits, RocksDB iterator lifetimes, pg.zig type strictness), collection index backfill, and operational numbers. also: SPA deep link fixes for standard.site, missing devlog entries in publish-docs.zig, CI glibc fix. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>