Initial import of verae-request-splitter from zapier monorepo

SUMMARY.md

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+# verae-request-splitter
+
+**Job:** Peel a request into (1) chain hash and (2) off-chain archive puts.
+
+**Expects messages from:** middleware-http (in-process call today; later NATS `verae.splitter.in` if split out).
+
+**Sends messages to:**
+- Chain path: `{ sha256, hashAlg, data? }`
+- `verae.archive.put` for each `publicMeta` / `privateMeta` / `file`
+
+**Does not talk to Zapier or NATS job poller.**
+
+**Test:** `npm test` — hash-only has zero puts; two files + public meta → 3 puts.