Add epsilon section to README

[giladbarkan-github]

Adding visibility to epsilon search could help consumers become more acquainted
with the feature and help elicit feedback about adding such automation to
clients.

(https://wicg.github.io/attribution-reporting-api/#source-registration-json-key-event_level_epsilon)

[csharrison]

Hey Gilad can you point to the spec associated with this feature?

[giladbarkan-github]

Hey Gilad can you point to the spec associated with this feature?

Sure! My only concern would be if the link might change in the future, it's hard to keep track of where it's used.

[giladbarkan-github]

Hey Gilad can you point to the spec associated with this feature?

Sure! My only concern would be if the link might change in the future, it's hard to keep track of where it's used.

Done.

[csharrison]

Oh sorry I am fine with adding it to the explainer, but I would have been fine just adding it to the PR description too :)

[giladbarkan-github]

Oh sorry I am fine with adding it to the explainer, but I would have been fine just adding it to the PR description too :)

Lol, done!

[csharrison]

Hm you linked to event_level_epsilon definition but not the search feature. Where is that specified?

[giladbarkan-github]

Hm you linked to event_level_epsilon definition but not the search feature. Where is that specified?

I'm confused. We haven't spec'd an automated search feature. This README update is to call out functionality available with the flexible event JavaScript script.

[csharrison]

🤦 sorry I totally misread your PR. Apologies