RIP endpoints and multinet - #458
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Multinet was introduced as unfinished work. Its short development history records brittle command generation, command-table crashes, and recorder workarounds. Before the first release, which already contained WAS, 8cc0e4f ("CI: don't generate speech commands") disabled it in release builds. No Willow or WAS release has ever supported it. Since 99f44c2 ("build: make MultiNet support opt-in"), it has only been available through an explicitly unsupported manual build option. We never made it stable, and its constrained on-device recognition cannot provide an experience as good as WIS. Remove the dormant recorder and UI branches, build option, command generator, and Multinet model selection. WIS becomes the sole speech recognition path while ESP-SR remains for wake-word detection. The main benefit is reducing the C migration surface. This deletes 278 lines overall, including 147 lines from C sources and headers.
Willow currently honors was_mode being disabled and then sends WIS results directly to Home Assistant, openHAB, or a generic REST endpoint. WAS provisioning enables WAS mode by default but deliberately retains this legacy fallback. Remove that fallback and make WAS-mediated command handling mandatory. Always forward WIS results to WAS, and remove the direct endpoint clients together with their endpoint-only HTTP helpers. This shrinks the remaining C and header code by 790 lines. Keep the WAS WebSocket and the HTTP client used by OTA and WIS. Existing v1 configuration documents may still contain was_mode and the legacy endpoint fields, but the firmware no longer consumes them. Link: HeyWillow/willow-application-server#151
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Remove direct endpoint and multinet support.