Automatically issue persistent public token IDs for tokens in annotation resources

[bkis]

These should be

• displayed in the annotation details modal
• part of the export (needs adjustment for CSV export logic!)
• reflect the resource they are part of

Idea:

rv_         casa_                           66695e4a14f6d337f7788740
[text slug] [slug/prefix of resource title] [unique ID]

@an-fischer FYI

[bkis]

Or, instead of [slug/prefix of resource title], just use [resource ID]

[bkis]

@JenniferBunselmeier FYI