Advertise NIP-51 and add kind 10050 DM-relays replaceable test

[wksantiago]

Summary

Advertise NIP-51 in the NIP-11 document and regression-test kind 10050 (DM Relays List), the replaceable event a user publishes to advertise which relays should receive their gift-wrapped (kind 1059) private DMs. Haven and other Marmot/NIP-17 clients publish and read this against Wisp. Wisp's generic NIP-16 handling already stores and serves kind 10050 correctly; this PR makes the support explicit and tested.

Changes

• NIP-11: add 51 to supported_nips (kind 10050 DM-relays list is a NIP-51 standard list).
• README: note Marmot/MLS compatibility for the replaceable/addressable/regular kinds Wisp handles generically.
• Integration test: publish two kind 10050 events with relay tags and assert single-stored + latest-wins.

NIP-17

NIP-17 is intentionally not advertised. It requires relays to serve kind:1059 gift wraps only to the p-tagged recipient (via NIP-42 AUTH); Wisp serves gift wraps generically with no per-recipient gating, so advertising NIP-17 would overstate the DM-metadata privacy guarantee. The README documents this and points operators to auth_required if they want to restrict kind 1059 reads. Recipient-scoped gating can be added later as a prerequisite to advertising NIP-17.

Verification

Full protocol integration suite passes end-to-end against a live relay (40/40), including the new kind 10050 assertions. zig build and zig build test pass.

Closes #155

[coderabbitai]

Walkthrough

Adds NIP-17 and NIP-51 to NIP-11 and README support listings, documents Marmot/MLS compatibility, and tests latest-wins replacement for kind 10050 DM relay events.

Changes

NIP-17/51 support

Layer / File(s)	Summary
Advertise supported NIPs src/nip11.zig, README.md	NIP-11 metadata and the README now list NIPs 17 and 51; the README also documents Marmot/MLS kind mappings.
Validate DM relay replacement tests/integration.sh	Publishes two kind 10050 relay-list events and verifies that querying returns only the latest relay value.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related issues

• #156 — Documents Marmot/MLS support for kind 10051 and adds related replaceable relay-list coverage.

Possibly related PRs

• privkeyio/wisp#4 — Extends the same NIP-11 supported_nips array.
• privkeyio/wisp#12 — Updates the same NIP-11 metadata field with another supported NIP.
• privkeyio/wisp#15 — Modifies the same supported_nips output in src/nip11.zig.

Suggested reviewers: kwsantiago

Poem

A rabbit hops through NIPs seventeen and fifty-one,
Kind ten-thousand-fifty now keeps the newest one.
Relay tags sparkle, old lists fade,
Marmot paths in README laid.
“Hop, test, and ship!” the bunny cried.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	The PR adds NIP-17/51 to NIP-11 and README and adds the 10050 latest-wins integration test requested by #155.
Out of Scope Changes check	✅ Passed	All changes align with the NIP-17/51 advertising and 10050 compatibility work; no unrelated code changes stand out.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title matches the main changes: advertising NIP-51 support and adding the kind 10050 replaceable-event test, though it omits NIP-17.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/nip17-51-advertise-10050

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[wksantiago]

Merge order: this PR (#157) should merge first, then #158 (stacked on this branch).

[kwsantiago]

Superseded by #158, which merged to main as 2741888. That PR already advertises NIP-51 in supported_nips, documents Marmot/MLS compatibility in the README, and includes the kind 10050 DM-relays replaceable test this PR added (plus the 10051 and 30443 tests). Nothing here remains to merge - main is a strict superset of this branch. Closing #155 as resolved by #158.