Scraper debug output goes to stderr which is invisible in MCP stdio mode.
Add capture_logs context manager that attaches a StringIO handler to the
schwab_scraper logger during tool execution, then includes captured logs
in the response envelope when debug=True or on failure.
Applied to login() and refresh_session() which are the critical paths
for authentication diagnostics.
Patch RequestResponder.respond() and cancel() at startup to handle
the race where a notifications/cancelled arrives between handler
return and respond(), which crashes the session with
"AssertionError: Request already responded to".
Also improve build.sh to handle registry push failures gracefully
and auto-restart the container after building.
