Fix: Critical syntax error in Web3Pipeline constructor

[0xAxiom]

What: Fixes critical JavaScript syntax error in Web3Pipeline constructor

Why:

• Constructor contained await import('crypto') which is invalid JavaScript syntax
• Constructors cannot be async or contain await expressions
• This would cause a runtime error when instantiating Web3Pipeline class
• Found during security review by Cipher sub-agent

Tested:

• Moved async crypto import to separate initialize() method
• initialize() is called at start of execute() method
• Maintains same functionality but with correct async/await pattern
• No other constructor patterns use await in the codebase

Impact:

• Critical: This was preventing the Web3Pipeline from working at all
• Security: Cipher flagged this as a medium security issue due to runtime failure
• Quality: Improves code reliability and follows JavaScript best practices