refactor(api): rename workspace-api authority to server-api

Absorb the Server HTTP DTO catalog and generators into server-api, remove the obsolete workspace-api package/path, preserve the separate runtime transport authority through explicit boundary DTO conversions, and rename the aggregate frontend projection as a bounded legacy artifact.

crates/runtime-api/Cargo.toml

@@ -10,7 +10,6 @@ api-macros = { workspace = true, features = ["reqwest", "axum"] }
 manifest.workspace = true
 protocol.workspace = true
 serde = { workspace = true, features = ["derive"] }
-workspace-api.workspace = true
 workdir.workspace = true
 
 [dev-dependencies]