Updated DuckDB to v1.4.1

Converted to use Bind variables for internal dictionary queries - for…

… better performance and security. Prevents SQL injection.

Revisions to SQL logging. Error out on use of "token" as a username f…

…or the server. Closes #36

Merge pull request #60 from summationai/fix-cert-path-name

Fix: Update the options name to token-signature-verify-cert-path to be consistent with env variable

Small bugfix in help

Improved USE schema handling and session management.

Improved token auth handling

Improved token auth handling

bugfix of query cancel logic

refactoring of query cancel logic