Add regex to import filters (see Explora) #1227
Description
Is your feature request related to a problem? Please describe
- More flexible options when adding to the allow and block list filters when importing. Use regular expression option with free text.
Describe the solution you'd like
- See Explora (Canada) who have already done this. (Their scenario: avoid multiple providers sharing the same events and being duplicated).
Additional context
- Risk of very complex regex taking up much CPU cycles, so limit somehow (eg string length)
- Raised at focus group 2026-01-27