feat(steps): cross-tier channels — a client's fetch onto its own route, queue jobs onto consumers, bus and socket events onto handlers

- resolution/tier-synthesizer.ts: http-client (literal fetch/axios/ky/got/$fetch paths, axios.create baseURL instances, template holes as :params, base-URL holes by a two-segment tail; unique match only), queue-job (BullMQ/Bull add ↔ @Process/@Processor, WorkerHost process, new Worker, queue.process), event-bus (EventEmitter2 emit ↔ @OnEvent with globs; socket emit ↔ @SubscribeMessage / socket.on both ways with tier); channel, tier, callee, registeredAt on every edge; generic transport events never pair; test and generated files never sources; registered before the emitter pass
- steps.ts: crossing() reads tier/channel before languages; an endpoint reached across a tier is a bridge box and a boundary like a screen (through=1 enters it); a channel's call is not also an effect; sites read as written; a Next 'use server' action is a crossing by its directive (when.ts directive); a function-valued constant handler (asyncHandler(...)) is a route root and borrows the file-scope calls and refs within its lines
- express.ts: app.use('/prefix', router) mounts composed onto route names in postExtract (nested, by import or require); chained router.route('/x').get(h).put(h2) extracted, across lines
- frameworks/package-deps.ts: dependencies read from workspace package.json files too (Express, React, Expo Router, NestJS detect)
- routing manifest names constant handlers; e2e/ is a test directory; explore's Flow section labels the new channels
- tests: ui-steps-cross-tier (monorepo fixture: Next client + Express/Nest API), servers test updated for the queue landing
- docs: CHANGELOG, spec §3.13 cross-tier paragraph, CLAUDE.md, callback-edge-synthesis.md, plan P3 built

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01REFyW9hmNrxhwN5wxRoAkC

src/search/query-utils.ts

@@ -332,9 +332,10 @@ export function isTestPath(filePath: string): boolean {
     lower.includes('/tests/') || lower.includes('/test/') ||
     lower.includes('/__tests__/') || lower.includes('/spec/') ||
     lower.includes('/specs/') || lower.includes('/testlib/') ||
-    lower.includes('/testing/') ||
+    lower.includes('/testing/') || lower.includes('/e2e/') ||
     lower.startsWith('test/') || lower.startsWith('tests/') ||
     lower.startsWith('spec/') || lower.startsWith('specs/') ||
+    lower.startsWith('e2e/') ||
     // CamelCase test source-set dirs (Kotlin Multiplatform / Gradle / Xcode):
     // jvmTest/, commonTest/, androidTest/, iosTest/, integrationTest/. Capital-led
     // so "latest/" / "manifest/" are not matched.