opt-in: only quote-post followers

[zzstoatzz]

context

the bot currently quote-posts anyone whose post matches bufo phrases. this is technically opt-out (via blocking), not opt-in, which may violate bluesky's terms of service around unsolicited interactions.

see: https://bsky.app/profile/christian.bsky.social — "respect for opt-in. too many opt-out bots circulating rn"

proposal

only quote-post users who follow the bot (@find-bufo.com). currently ~17 followers, so the set is small.

implementation notes

• getRelationships (already called for block check) returns a followedBy field — zero additional API calls needed
• refactor isBlockedBy to return both block + follower status from the single response
• gate onPost: if not a follower, skip
• fail-closed on API errors (the whole point is consent)
• add non_followers_skipped counter to stats dashboard

references

• app.bsky.graph.getRelationships — followedBy field
• app.bsky.graph.defs#relationship — lexicon schema