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Add kind:31234 as an author-only, channel-less, parameterized-replaceable event kind for encrypted draft wraps per NIP-37. Privacy enforcement spans every relay read path: - WS REQ: AUTHOR_ONLY_KINDS gate closes the subscription with restricted: for any requester who isn't the author - WS COUNT: same gate applied before the count query executes - HTTP bridge /query + /count: post-filter and guard use AUTHOR_ONLY_KINDS - Live fan-out: AUTHOR_ONLY_KINDS check in dispatch_persistent_event_inner prevents draft events from being pushed to non-author subscribers - FTS (NIP-50): migration 0007 sets search_tsv = NULL for kind:31234, making drafts storage-level unsearchable Ingest validation (validate_draft_wrap_envelope): - Exactly one non-empty d tag (any bounded value; relay is grammar-agnostic) - Exactly one k tag with canonical u16 decimal (no leading zeros, fits u16) - No h or p outer tags (compose context belongs in encrypted payload only) - Content: empty string (tombstone) or NIP-44 v2 ciphertext shape check - Optional expiration: at most one, decimal, strictly future, ≤ safe integer NIP-11 now advertises NIP-37. NIP-40 is intentionally not advertised because Buzz does not yet suppress expired rows on read. Schema migration 0007 extends the search_tsv generated column exclusion list with kind 31234. New tests: - 23 unit tests for validate_draft_wrap_envelope in ingest.rs covering every acceptance and rejection path - Comprehensive E2E test suite in e2e_nip37_draft.rs covering write validation, NIP-01 replacement ordering, tombstone persistence, author-only REQ/COUNT/HTTP, kindless/mixed filter privacy, known-d privacy tripwires, live fan-out isolation, and NIP-11 advertisement Co-authored-by: Will Pfleger <pfleger.will@gmail.com> Signed-off-by: Will Pfleger <pfleger.will@gmail.com>