Add structured logging to MCP server and log-configure-from-args! helper

Message

sigil-log: Add log-configure-from-args! which parses --log and --log-level from command-line args for easy CLI setup.

sigil-mcp server: Add structured logging at trace/debug/warn/error levels using keyword args. Use log-trace (not log-trace*) to avoid syntax export issues in bundled apps. Use cond instead of if/begin in handle-tools-call for correct control flow.

Changed

 src/sigil/log.sgl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Diff

src/sigil/log.sglmodified

@@ -404,4 +404,4 @@

404

(loop (cddr rest) (cadr rest) log-level))

405

((and (equal? (car rest) "--log-level") (pair? (cdr rest)))

406

(loop (cddr rest) log-file (string->symbol (cadr rest))))

−407

(else (loop (cdr rest) log-file log-level)))))))

+407

(else (loop (cdr rest) log-file log-level)))))))

408

No newline at end of file