Create SECURITY.md

Author: bylickilabs

SECURITY.md

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+### 🔒 Overview
+
+> SecureAI PolicyGuard is a security-sensitive AI application.  
+  - We prioritize **confidentiality, integrity, and traceability**.
+
+---
+
+### ⚠️ Reporting a Vulnerability
+
+Do **not** disclose vulnerabilities publicly via Issues.
+
+Instead:
+1. Email  
+   **[email protected]**
+2. Include:
+   - Detailed vulnerability description  
+   - Steps to reproduce  
+   - Affected version / commit hash  
+   - (Optional) recommended fix
+
+- You’ll receive an initial response within **48 hours**,  
+  - and a full evaluation within **5 business days**.
+
+---
+
+### 🧩 Supported Versions
+
+| Version | Status |
+|----------|--------|
+| v1.0.x   | 🟢 Supported |
+| < v1.0   | 🔴 No longer supported |
+
+---
+
+### 🧠 Security Principles
+
+- **Zero-trust architecture** for API & encryption layers  
+- **OWASP Top 10** compliance checks in every release  
+- **CodeQL scans** via GitHub Actions  
+- Integrated **audit logging** & policy verification
+
+---
+
+### 📜 Disclosure Policy
+
+- No public disclosure without coordination  
+- CVE reference (if applicable) & changelog note after patch
+
+---