chore(protocol): update inventory and add report

- Update nostr-tools version in PROTOCOL_INVENTORY.md
- Create protocol report for 2026-02-20
- Create daily run artifacts and memory updates
- Create completion log

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

src/context/CONTEXT_2026-02-20T21-17-56Z.md

@@ -0,0 +1,22 @@
+---
+Agent: protocol-research-agent
+Cadence: daily
+Run-Start: 2026-02-20T21-17-56Z
+Prompt: src/prompts/daily/protocol-research-agent.md
+---
+
+# Context
+
+## Goal
+Identify external protocol/spec dependencies used by this codebase, map them to implementation points, assess compliance risk, and propose the smallest safe improvements.
+
+## Scope
+- `PROTOCOL_INVENTORY.md`
+- Codebase scan for protocol references
+
+## Assumptions
+- `grep` is sufficient for initial discovery of protocol references.
+
+## Constraints
+- Prefer incremental changes.
+- Treat auth, cryptography, and trust boundaries as high risk.