Enhance SECURITY.md with comprehensive security policy

SECURITY.md

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+# Security Policy
+
+Security is a cornerstone of DataJourneyHQ's development philosophy.
+We are committed to maintaining the highest standards of security for our platform and
+deeply value the security community's role in helping us achieve this goal.
+
+## Vulnerability Disclosure
+
+We encourage responsible disclosure of security vulnerabilities.
+If you identify a potential security issue in DataJourneyHQ/MCP, here's how to report it:
+
+### Reporting Process
+
+1. **Submit a Vulnerability report**: [Click here](https://github.com/DataJourneyHQ/MCP/security/advisories)
+2. **Comprehensive Details**: Include reproduction steps, potential impact assessment, affected versions, and any proof-of-concept code or screenshots.
+
+## Our Response Framework
+
+When you submit a security report, DataJourneyHQ's security team commits to:
+
+**Initial Response**
+- Confirmation of report receipt
+- Initial impact assessment
+
+**Investigation Phase**
+- Thorough analysis of the reported issue
+- Severity classification using industry standards
+
+**Resolution & Disclosure**
+- Development and testing of security patches
+- Coordinated release of fixes across affected versions
+
+## Coverage Scope
+
+**This policy encompasses:**
+- DJHQ MCP core application code
+- Configuration and deployment scripts
+- Documentation that could impact security
+
+**Out of Scope:**
+- Third-party dependencies (reported separately to respective maintainers)
+- Social engineering attacks
+- Physical security issues
+
+## Get In Touch
+
+For security-related inquiries, vulnerability reports, or general security questions:
+
+**Contact info**: [security@datajourneyhq.com](mailto:security@datajourneyhq.com)
+
+We appreciate your efforts in keeping DataJourney secure for everyone!