docs: comprehensive architecture delta record for hardening phase
Catalogs all architectural changes from resident runtime implementation:
- Runtime model: daemon-like process with coordinated shutdown
- Broker dispatch: shutdown operation integration
- Logger persistence: explicit IPL logging to MongoDB with root GUID lineage
- Developer diagnostics: chain tracing and web-based observability
- Config system: trace_on and logger_admin controls
- Observability utility: modern log_dumper web UI (replaces legacy PHP dumper)
- Operational safety: dev-only purge-on-IPL controls
Files modified: 13 (src/main.rs, brokers/*, config/*, bin/log_dumper.rs, Cargo.*, wiki/*)
Dependencies added: axum, chrono, uuid
See wiki/12-architecture-deltas.md for full details.
gramps
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