This PR fixes the trace context generation issue by implementing proper W3C Trace Context support:

• Added a dedicated trace_context module for handling trace context generation and parsing
• Implemented functions to generate and parse W3C compliant traceparent and tracestate headers
• Added helper functions to inject trace context into outgoing requests
• Added helper functions to extract trace context from incoming requests
• Added comprehensive tests to verify functionality
• Updated worker invocation code to properly propagate trace context

The implementation follows the W3C Trace Context specification and ensures that trace context is properly propagated across service boundaries.

/claim #1514