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Johnathan Corgan
f825fa242f
Implement hybrid coordinate cache warming strategy: piggyback coords via CP flag when they fit within transport MTU, send standalone CoordsWarmup (0x14) message when they don't. On CoordsRequired or PathBroken receipt, send CoordsWarmup immediately with source-side rate limiting (default 2s per destination, configurable). - Add CoordsWarmup = 0x14 session message type (empty body, CP flag) - Add send_coords_warmup() following send_session_msg() pattern - Restructure send_session_data() to send standalone warmup before data packet when piggybacked coords exceed MTU - Add immediate CoordsWarmup response in handle_coords_required() and handle_path_broken() with per-destination rate limiting - Add coords_response_interval_ms config (node.session) - Add RoutingErrorRateLimiter::with_interval() constructor - Zero transit-path changes: existing try_warm_coord_cache() handles CoordsWarmup identically to CP-flagged data packets - Update design docs (session layer, wire formats, mesh operation, configuration)