fix(tcvdb): escape session filter literals

[YOMXXX]

Summary

• Escape backslashes and double quotes before interpolating session_key / session_id into TCVDB filter expressions.
• Add a regression test that captures generated L1/L0 query filters for injection-shaped session values.

Verification

• npm test -- --run
• npm run build

[Maxwell-Code07]

Thanks for this fix! Session filter injection was indeed a security concern — properly escaping backslashes and double quotes, plus adding a regression test, very thorough work 👍