docs: fix config table, test-location claims

Makefile

@@ -92,10 +92,10 @@ check-dockerfile-manifests:
 	copied=$$(sed -n 's/^COPY \([^[:space:]]*\)\/Cargo\.toml[[:space:]].*/\1/p' Dockerfile | grep -v '^\(Cargo\.toml\|\.\)$$' || true); \
 	bad=""; \
 	for m in $$members; do \
-	    echo "$$copied" | grep -qx "$$m" || bad="$$bad missing-COPY:$$m"; \
+	    echo "$$copied" | grep -qxF "$$m" || bad="$$bad missing-COPY:$$m"; \
 	done; \
 	for c in $$copied; do \
-	    echo "$$members" | grep -qx "$$c" || bad="$$bad not-a-member:$$c"; \
+	    echo "$$members" | grep -qxF "$$c" || bad="$$bad not-a-member:$$c"; \
 	done; \
 	if [ -n "$$bad" ]; then \
 	    echo "❌ Dockerfile manifest COPY lines out of sync with workspace members:$$bad"; \