Returns the attachment's locators that are fetchable right now: their kind is
supported by this client and (if a policy is supplied) allowed by the group.
Fetchability is judged at fetch time against the group's CURRENT policy and
the client's current support, never against the source epoch
(features/encrypted-media.md — Validation). An unsupported/out-of-policy
locator is skipped, not treated as invalid. Order is preserved.
Returns the attachment's locators that are fetchable right now: their kind is supported by this client and (if a policy is supplied) allowed by the group.
Fetchability is judged at fetch time against the group's CURRENT policy and the client's current support, never against the source epoch (
features/encrypted-media.md— Validation). An unsupported/out-of-policy locator is skipped, not treated as invalid. Order is preserved.