chart from query params, full payload on page load

[DaveSkender]

As a maintainer of Stock Indicators libraries, I'd like to be able to share URLs to the chart site with specific examples; which would require use of query parameters.

More specifically, we'd need to honor URLs with query params, without overwriting storage + builder and permalink URL generator, may need GUID and blob storage, to better enable sharing.

Other related items to consider:

• Return all data in one call on page load, for efficiency, then incrementally add user modifications
• Convert to minimal API (backend) -- may be OBE if we do other planned projects