Annotate "unable to load CoValue" with more information

[aeplay]

• Schema name
• Stack trace

So devs can understand what might have been affected when they saw the warning

[Schniz]

All errors should have stack trace. All warnings should have a stack trace and what happened and how to fix it (maybe the howto can be a link to docs) because it's not a failure. Errors and warnings should be well defined based on levels. Maybe allowing to have a custom logger is a start.

[Schniz]

All errors should have a consistent error code and be documented with examples in the website

[Schniz]

@opencode-agent can you create a new package jazz-error-codes that will contain all errors and warnings with a unique numeric code and docs for these error codes stored as markdown files in that package