Fix firehose/subscription interop and remaining type mismatches master
- Firehose callbacks: use indigo's atproto types (indigoatproto alias) for subscription callback signatures, since indigo's RepoStreamCallbacks expects indigo types. Handler functions changed to accept indigo types. - Labeler: fix double-pointer in FromLexicon call. - All remaining pointer-vs-value mismatches in model, atproto, vod, director, replication, viewlog, spxrpc packages. - Makefile: separate type generation (all namespaces) from server stub generation (only place/stream + games) to avoid generating stubs for unimplemented atproto/bsky endpoints. - Remove atproto/bsky handler registration from spxrpc.go (those endpoints are handled differently). Remaining: ~10 handler naming mismatches in spxrpc (generated stub names vs hand-written handler names) and a few pointer issues in multistream/storage. These need manual resolution.