Clean up repo for external review — remove clutter, fix README, gitignore EVM contracts

- Remove 9 redundant root-level markdown files (QUICKSTART, DEPLOYMENT_SUMMARY, etc.)
- Fix duplicate flashstack-sbtc-pool row in README contracts table
- Gitignore Solidity contracts (AaveLiquidationFlash, VenusFlashLiquidator) — not part of Stacks protocol
- Gitignore PM2 configs, .mcp.json, and local experiment scripts
- Add CODE_OF_CONDUCT.md, ROADMAP.md, security CI workflow
- Add twitter header assets, logo, bot page, dashboard/logger scripts
- Update deploy script, pool page, monitor scripts

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: mattglory

.github/workflows/security.yml

@@ -0,0 +1,46 @@
+name: Security Scan
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: "0 9 * * 1"  # Every Monday 9am UTC
+
+jobs:
+  dependency-audit:
+    name: Dependency Audit
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+
+      - name: Audit root dependencies
+        run: npm audit --audit-level=high
+        continue-on-error: true
+
+      - name: Audit web dependencies
+        run: cd web && npm audit --audit-level=high
+        continue-on-error: true
+
+  codeql:
+    name: CodeQL Analysis
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: javascript
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3

.gitignore

@@ -147,3 +147,23 @@ web/.next/
 web/node_modules/
 docs/OUTREACH.md
 docs/archive/ANNOUNCEMENT_TEMPLATES.md
+
+# Ethereum/Solidity contracts (not part of this Stacks protocol)
+contracts/*.sol
+
+# PM2 / server configs (deployment ops, not protocol code)
+ecosystem.config.cjs
+ecosystem.config.vps.cjs
+
+# Local dev scripts and experiments
+config/
+scripts/deploy-debug.mjs
+scripts/deploy-stub-test.mjs
+scripts/deploy-rescue.mjs
+scripts/estimate-vault-rescue.mjs
+scripts/run-vault-rescue.mjs
+scripts/usda-peg-trade.mjs
+scripts/check-bitflow-lp.mjs
+
+# Nova MCP config (local tooling)
+.mcp.json

CODE_OF_CONDUCT.md

@@ -0,0 +1,53 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in the FlashStack community a harassment-free experience for everyone, regardless of age, body size, visible or invisible disability, ethnicity, sex characteristics, gender identity and expression, level of experience, education, socio-economic status, nationality, personal appearance, race, caste, color, religion, or sexual identity and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming, diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment:
+
+- Demonstrating empathy and kindness toward other people
+- Being respectful of differing opinions, viewpoints, and experiences
+- Giving and gracefully accepting constructive feedback
+- Accepting responsibility and apologizing to those affected by our mistakes
+- Focusing on what is best not just for us as individuals, but for the overall community
+
+Examples of unacceptable behavior:
+
+- The use of sexualized language or imagery, and sexual attention or advances of any kind
+- Trolling, insulting or derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information without their explicit permission
+- Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of acceptable behavior and will take appropriate and fair corrective action in response to any behavior that they deem inappropriate, threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when an individual is officially representing the community in public spaces.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported to the community leaders responsible for enforcement at **security@flashstack.xyz** or via GitHub at [@mattglory](https://github.com/mattglory).
+
+All complaints will be reviewed and investigated promptly and fairly.
+
+## Enforcement Guidelines
+
+**1. Correction** — Private written warning with clarity around the violation.
+
+**2. Warning** — A warning with consequences for continued behavior.
+
+**3. Temporary Ban** — Temporary ban from community interaction.
+
+**4. Permanent Ban** — Permanent ban from any public interaction within the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant](https://www.contributor-covenant.org), version 2.1.