Security/add security md

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Setup Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '18'
+        cache: 'npm'
+    - name: Install dependencies
+      run: npm install
+    - name: Run tests
+      run: npm test

SECURITY.md

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+# Security Policy
+
+## Reporting a Vulnerability
+
+We take security seriously at Eventura. If you discover a security vulnerability, please report it responsibly.
+
+**DO NOT open public issues for security vulnerabilities.**
+
+### How to Report
+
+Please send security reports to: **[email protected]**
+
+Include the following information:
+- Description of the vulnerability
+- Steps to reproduce
+- Potential impact
+- Any suggested fixes (optional)
+
+### Response Timeline
+
+- **Initial Response**: Within 24 hours
+- **Status Update**: Within 72 hours
+- **Resolution Target**: Within 14 days for critical issues
+
+## Supported Versions
+
+| Version | Supported          |
+| ------- | ------------------ |
+| Latest  | :white_check_mark: |
+
+## Smart Contract Security
+
+Our Solidity contracts implement:
+- OpenZeppelin security libraries
+- ReentrancyGuard on all financial operations
+- Pausable emergency stop mechanism
+- Multi-signature admin controls
+- Access control for event organizers
+
+A security audit is planned with a reputable firm before mainnet deployment.
+
+## Responsible Disclosure
+
+We kindly ask that you:
+- Give us reasonable time to fix the issue before public disclosure
+- Do not exploit the vulnerability beyond what is necessary to demonstrate it
+- Do not access or modify other users' data
+
+Thank you for helping keep Eventura secure!