feat(agents): execute daily nip-research-agent

- Fetch missing NIP specs (09, 21, 25, 42, 47, 57, 71, 78, 96, 98)
- Update NIP_INVENTORY.md
- Generate nip-report-2026-02-15.md
- Create completion log

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

docs/agents/task-logs/daily/2026-02-15_00-57-50_nip-research-agent_completed.md

@@ -0,0 +1,15 @@
+# Daily Task Log: nip-research-agent
+
+- **Date**: 2026-02-15
+- **Agent**: nip-research-agent
+- **Status**: Completed
+
+## Summary
+- Fetched canonical specs for NIP-09, 21, 25, 42, 47, 57, 71, 78, 96, 98.
+- Updated `NIP_INVENTORY.md` with new findings.
+- Generated `nip-report-2026-02-15.md`.
+
+## Artifacts
+- `artifacts/nips/*.md`
+- `NIP_INVENTORY.md`
+- `nip-report-2026-02-15.md`