fix(ci): track dist/routing/jev (was ignored → MODULE_NOT_FOUND in CI); lazy jev import in modelMapper

- dist/ is gitignored but legacy files stay tracked; new jev dist files
  were silently excluded — force-add them so CI's node test.js works
- modelMapper: lazy require + guard, heuristic fallback if jev missing

Author: Das-rebel

dist/routing/jev/jevRouter.d.ts

@@ -0,0 +1,49 @@
+/**
+ * JevRouter — System One routing for A3M.
+ *
+ * Replaces the autoregressive/heuristic routing loop with a single-pass
+ * calibrated decision (Jev interface pattern):
+ *
+ *   prompt ──► OptionAttention engine ──► { provider choice, complexity score,
+ *                                            capability noul flags }
+ *
+ * The engine is distilled from A3M's own System 2 router (advancedRouter.ts):
+ * tools/distill.mjs runs routeQuery over a synthetic prompt corpus and
+ * tools/train_jev.py trains the ~25k-parameter option-attention weights.
+ *
+ * Confidence guard: if the top provider probability is below MIN_CONFIDENCE,
+ * we fall back to the full heuristic router (System 2) — Jev decides the easy
+ * 90%, the heavy router handles the hard 10%.
+ */
+import { type RouteDecision } from "../advancedRouter";
+import { type OptionAttentionWeights } from "./optionAttention";
+import type { JevResponse } from "./types";
+/** Below this top-probability, defer to the System 2 heuristic router. */
+export declare const MIN_CONFIDENCE = 0.22;
+export declare function loadWeights(): OptionAttentionWeights | null;
+/** For tests / hot-reload of retrained weights. */
+export declare function resetWeightsCache(): void;
+/**
+ * Build the option text for a model profile. Option text is what the engine
+ * embeds — providers unseen at training time are still scored through their
+ * strengths/tier description.
+ */
+export declare function optionTextForModel(model: string, profile: {
+    providerName?: string;
+    strengths?: string[];
+    quality_score?: number;
+    cost_per_1k_input?: number;
+    cost_per_1k_output?: number;
+    type?: string;
+}): string;
+/**
+ * Single-pass Jev routing decision. Returns a RouteDecision shaped exactly
+ * like advancedRouter.routeQuery so it is a drop-in replacement.
+ */
+export declare function jevRoute(prompt: string, available_models?: string[], budget_multiplier?: number): RouteDecision & {
+    jev?: JevResponse;
+};
+/** Async variant with remote backend support. */
+export declare function jevRouteAsync(prompt: string, available_models?: string[], budget_multiplier?: number): Promise<RouteDecision & {
+    jev?: JevResponse;
+}>;