daily: nip-research-agent NIP-42 update

- Research NIP-42 compliance.
- Update NIP_INVENTORY.md (NIP-42: Non-compliant).
- Add artifacts/nips/42.md.
- Generate nip-report-2026-02-21.md.

Co-authored-by: PR0M3TH3AN <[email protected]>

test_logs/TEST_LOG_2026-02-21_nip-research-agent.md

@@ -0,0 +1,7 @@
+# Test Log: NIP-42 Research
+
+**Date:** 2026-02-21
+
+## Commands Run
+- `grep -n "AUTH" js/nostr/client.js`
+- `grep -r "AUTH" js/`