chore(deps): add brotli and rig-core, remove async-openai from workspace

Prerequisite for:
- feat(api): pre-compress static assets with brotli/gzip
- refactor(agent): Qdrant embedding

Cargo.toml

@@ -84,6 +84,7 @@ deadpool-redis = "0.23.0"
 deadpool = "0.13.0"
 dotenv = "0.15.0"
 env_logger = "0.11.10"
+brotli = "7.0"
 flate2 = "1.1.9"
 git2 = "0.20.4"
 slog = "2.8.2"
@@ -145,7 +146,6 @@ tracing-opentelemetry = "0.32.1"
 tonic = "0.14.5"
 tonic-build = "0.14.5"
 uuid = "1.22.0"
-async-openai = { version = "0.34.0", features = ["embedding", "chat-completion"] }
 hostname = "0.4"
 utoipa = { version = "5.4.0", features = ["chrono", "uuid"] }
 rust_decimal = "1.40.0"
@@ -170,6 +170,7 @@ base64ct = "1"
 p256 = { version = "0.13", features = ["ecdsa", "std"] }
 http = "1"
 tempfile = "3"
+rig-core = "0.30"
 
 [workspace.package]
 version = "0.2.9"