docs: add BetaList submission content for clavitor.ai launch (TASK-071)

docs/BETALIST.md

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+# BetaList — Clavitor Submission
+
+*BetaList is a curated list of early-stage startups and betas. Good for early adopters and developer audience.*
+
+---
+
+## Submission Form Fields
+
+**Startup Name:** Clavitor
+
+**Tagline** (one line, ~100 chars):
+```
+The password manager your AI can use — without seeing your credit card
+```
+
+**Website:** https://clavitor.ai
+
+**Description** (2–3 sentences):
+```
+Clavitor is a password manager built for developers who use AI assistants. 
+It uses two-tier encryption: API keys, SSH keys, and TOTP codes are AI-readable 
+via MCP (Claude Code, Codex, Cursor). Credit cards, passport numbers, and private 
+keys are encrypted with WebAuthn PRF — client-side only, server never has the key.
+One Go binary. MIT licensed. Self-host free or hosted at $12/year.
+```
+
+**Category:** Developer Tools / Security
+
+**Keywords / Tags:** `password-manager`, `ai`, `mcp`, `webauthn`, `developer-tools`, `open-source`, `self-hosted`, `totp`, `security`
+
+**Twitter/X handle:** @clavitor (register before submitting)
+
+**Screenshot:** Required — 1280×800 or 2560×1600. Use the vault split-screen (L1/L2 fields).
+
+---
+
+## Target Audience on BetaList
+
+BetaList users are early adopters, indie hackers, and developers — perfect fit. Expect:
+- 50–200 early access signups if listed
+- Feedback from developers who actively use AI coding tools
+- Some organic traffic from their newsletter
+
+## When to Submit
+
+Submit 2–4 weeks before public launch. BetaList has a review queue; expect 1–3 week wait before going live.
+
+## Pre-Submit Checklist
+
+- [ ] @clavitor X handle registered
+- [ ] Screenshot ready (1280×800)
+- [ ] clavitor.ai live with working install page
+- [ ] Email capture working on clavitor.ai (for early access list)
+
+## Submission URL
+
+https://betalist.com/submit