3.4.0 (2026-08-25) Features api: Add obfuscation field to ChatCompletionChunk (#3690) (c7d8e1d) api: add project residency configuration and cost quantity units (#3726) (bc4f8ef) Bug Fixes api: encode Realtime call offers and session configuration (#3736) (555ac48) apply consistent origin checks to WebSocket redirects (#3693) (1b324d0) azure: encode deployment names consistently (#3683) (689538d) azure: keep provider validation errors value-free (#3691) (72529c0) azure: resolve one authentication mode (#3689) (e3d0681) compute custom-code summaries from trusted workflow code (#3692) (2b5868d) create upload example fixtures in private directories (#3686) (f36e6f7) decode SSE incrementally without limiting event size (#3687) (2598d53) keep Python SDK diagnostics metadata-only (#3685) (600aa8d) Preserve Azure authentication boundaries across transports (#3684) (06ef57c) preserve the configured TLS hostname (#3694) (aa5fbc4) preserve WebSocket send queue byte accounting during flush (#3688) (96f966d) Chores api: Clarify image background docs and preview support (#3703) (bedb9a7) api: document supported image generation models (#3695) (8edd9ae) api: move chat validation tests out of…