openai/gpt-chat-latest → A (4:1)

Side A delivers a substantial architectural change to identity management: it makes UUIDs the canonical identity, refactors OAuth into a provider-agnostic linking flow, adds Reddit OAuth, prevents linking conflicts, exposes linked providers privately, and fixes trust-weight updates during projection replay with tests. Side B includes a useful startup-memory optimization by streaming event-log replay and moves entity payloads into a RocksDB-backed store, but much of the patch is vendoring a new `durable` crate, dependency churn, examples, and documentation whose lasting value is less directly tied to the application's core behavior.