// ─────────────────────────────────────────────────────────────────────────
// server.route.patch.el — GATED route for task #50, for engram/src/server.el.
// NOT APPLIED. Exposes the engram_ground_propagate native over HTTP so the
// soul's consolidation beat can fire one grounded edge-propagation pass.
// ─────────────────────────────────────────────────────────────────────────

// [1] New handler — add beside route_strengthen (server.el ~line 194).
//     Mutation (appends grounding events, updates confidence), so it is gated
//     on _auth via check_auth_ok, exactly like /api/edges. Persists once after
//     the beat — the whole point of running propagation as one batched beat
//     rather than per-node is to pay the snapshot cost a single time.
fn route_ground_propagate(method: String, path: String, body: String) -> String {
    if !check_auth_ok(method, body) { return err_json("unauthorized") }
    let tel: String = engram_ground_propagate()   // native — one beat over the store
    let saved: Int = persist_canonical()
    return tel                                     // gep_* telemetry JSON straight through
}

// [2] Dispatch — register in handle_request (server.el ~line 461, next to the
//     /api/strengthen arm):
//
//     if str_eq(method, "POST") && (str_eq(clean, "/api/ground/propagate")) {
//         return route_ground_propagate(method, clean, body)
//     }
//
// [3] Native declaration — engram_ground_propagate must be declared as an
//     extern runtime builtin (el_runtime.h) and seed-wrapped (el_seed.c /
//     el_seed.h __engram_ground_propagate) so the EL side can call it, same as
//     engram_strengthen / engram_hebb_drain_json.