[help wanted] Add SQL injection attack module

[Carlos-Projects]

Task

Create a new attack module for SQL injection testing on MCP servers.

What to do

• Create src/mcpwn/modules/sql_injection.py
• Test common SQLi payloads against resource/content endpoints
• Detect and report potential SQL injection vulnerabilities
• Register in the module registry
• Add tests for the new module

Skills needed

• Python, SQL injection techniques
• MCP protocol knowledge
• httpx or similar HTTP client

Acceptance criteria

• mcpwn attack --module sqli --url <url> runs SQLi tests
• Findings are properly reported
• All tests pass and lint is clean

See CONTRIBUTING.md.

[ARN4405]

Hi, Im interested in working on this issue. Can you assign it to me?