Properly sanitize markers based on the schema used

[gregtatum]

Remove:

• url
• file-path

[parttimenerd]

... and remove markers of specific names (configurable in the meta section of the profile) to remove other sensitive marker information (like environment variables or system libraries).

[julienw]

... and remove markers of specific names (configurable in the meta section of the profile) to remove other sensitive marker information (like environment variables or system libraries).

I would rather have it in the schema for a marker, but please file a separate bug for fiurther discussion. Thanks!