Milestone 3: NATS wait (gate 9), hash lookup, zappier timestamp, NS1 tunnel

Wait-via-NATS returns completed or pending+jobId (GATE 9). Mock SHA256
idempotent register + GET /hashes/{sha256}. Zappier commercial edge has
POST /v1/timestamp and hash-lookup. GATE 12 smoke (signup + wait) passes.

NS1 NATS is 127.0.0.1:4222 on 70.88.205.138; SSH tunnel :14222. Local
nats-server -js used for isolated tests. Activate app adds Echo Text.

Learned: JetStream on NS1 is loopback-only; do not bind 4222 public.

docs/modules/verae-activate/index.md

@@ -2,7 +2,7 @@
 
 **Package:** `verae-activate`  
 **Source:** `packages/verae-activate/index.js`  
-**Lines:** 21
+**Lines:** 23
 
 ## What this module is
 
@@ -10,7 +10,7 @@ Implementation module in `verae-activate`. The tables below are extracted from t
 
 ## Exports
 
-`version`, `platformVersion`, `authentication`, `creates`, `addNumbers`
+`version`, `platformVersion`, `authentication`, `creates`, `addNumbers`, `echo`
 
 ## Types / interfaces / classes
 
@@ -24,6 +24,7 @@ _No top-level functions extracted._
 
 - `./authentication`
 - `./creates/add_numbers`
+- `./creates/echo`
 - `./package.json`
 - `zapier-platform-core`