make: add eval-reach (V-405)

Scores the ecosystem reach fixture. Same MAVEN_ONNX_LIB deal as eval-router:
without it only the deterministic hash ratchet runs.

Makefile

@@ -16,7 +16,7 @@ PIPER_BIN     := $(shell pwd)/deps/piper/piper
 PIPER_MODEL   := $(shell pwd)/models/tts/ru_RU-irina-medium.onnx
 PIPER_ESPEAK  := $(shell pwd)/deps/piper/espeak-ng-data
 
-.PHONY: simulate stt-fixtures test-stt-golden all build build-stt build-tts build-daemon build-client build-waked build-web build-poll build-caldav clean test fmt-check vet run-stt run-tts run-web download-embedder deps-go eval-router eval-recall eval-phrasing eval-models build-gpud
+.PHONY: simulate stt-fixtures test-stt-golden all build build-stt build-tts build-daemon build-client build-waked build-web build-poll build-caldav clean test fmt-check vet run-stt run-tts run-web download-embedder deps-go eval-router eval-reach eval-recall eval-phrasing eval-models build-gpud
 
 all: build
 
@@ -119,6 +119,14 @@ MAVEN_ONNX_LIB ?= $(shell pwd)/deps/onnxruntime-linux-x64-1.26.0/lib/libonnxrunt
 eval-router:
 	MAVEN_ONNX_LIB="$(MAVEN_ONNX_LIB)" $(GO) test -v -count=1 ./internal/router/eval/
 
+# eval-reach — score the held-out ecosystem reach fixture (internal/router/eval,
+# ru_ecosystem_v1.json). Answers "does a real Russian utterance actually arrive
+# at Praxis or Hexis", which routing accuracy alone does not say. Same
+# MAVEN_ONNX_LIB deal as eval-router; without it only the deterministic hash
+# ratchet runs. Vikunja #405.
+eval-reach:
+	MAVEN_ONNX_LIB="$(MAVEN_ONNX_LIB)" $(GO) test -v -count=1 -run 'Reach|Praxis' ./internal/router/eval/
+
 # eval-recall — score the held-out note-recall fixture (internal/memory/recalleval).
 # Answers "can she find the note again when it matters": recall@1, recall@3,
 # false recall and the query_min_score sweep. Same MAVEN_ONNX_LIB deal as