Milestone 0: import zappier billing, Verae middleware, and Zapier research

Compose-ready workspace: packages/zappier (rate card, portal, Stripe),
packages/verae-zapier-middleware (timestamp + NATS), packages/verae-zapier
(CLI app), vendor/zapier-platform, and research/zapier vendor corpus.

Gate 0 structure checks pass. Product code and research are not yet wired.

research/zapier/scripts/clone-zapier-repos.sh

@@ -0,0 +1,35 @@
+#!/bin/sh
+# Shallow-clone official Zapier repos used to build connectors / applications.
+# Default dest: $ROOT/repos (ROOT defaults to this project).
+set -eu
+ROOT="${ROOT:-$(CDPATH= cd -- "$(dirname "$0")/.." && pwd)}"
+DEST="${1:-$ROOT/repos}"
+mkdir -p "$DEST"
+REPOS="
+zapier-platform
+sdk
+zapier-mcp
+connectors
+install-zapier
+agent-skills
+marketplace
+visual-builder
+resthooks
+zapier-platform-cli
+zapier-platform-core
+zapier-platform-schema
+zapier-platform-example-app-github
+zapier-platform-example-app-oauth2
+zapier-platform-example-app-minimal
+gtm-cheat-codes
+"
+for r in $REPOS; do
+  if [ -d "$DEST/$r/.git" ]; then
+    echo "UPDATE $r"
+    git -C "$DEST/$r" fetch --depth=1 origin && git -C "$DEST/$r" reset --hard FETCH_HEAD
+  else
+    echo "CLONE $r"
+    git clone --depth 1 "https://github.com/zapier/$r.git" "$DEST/$r" || echo "FAIL $r"
+  fi
+done
+echo "DONE $DEST"