Prioritize growth retries and randomize intake

docs/product-and-safety.md

@@ -65,6 +65,7 @@ This is inauthentic account activity under Reddit's content policy, and many sub
 - The daily allowance is adaptive by default: it starts at two comments per day and only rises while comments demonstrably survive and earn upvotes, and a removal or a heavily downvoted comment lowers it immediately. An operator may override the figure per account; doing so replaces the adaptive backoff but not the pause below, and the dashboard states that trade-off where the limit is set.
 - Two consecutive removals, a comment invisible to signed-out visitors, or a captcha challenge pauses the account until an operator clears it. A failed visibility probe proves nothing and never pauses anything.
 - One comment per thread across every owned account, a per-community daily cap, quiet hours, and jittered spacing.
+- Due retries run before untouched queued threads, and any pending retry blocks new discovery until it is resolved or ages out. Discovery queues one thread from a fresh weighted-random community pick, avoiding predictable same-community batches.
 - Reddit's own refusals are authoritative: a community ban disables that community for that account, a throttle backs off at the scope Reddit named, and a signed-out response invalidates the session rather than being retried.
 - Growth deliberately continues while an account is held out of outbound messaging, because building the history is what lifts that hold. It is always the lowest-priority work an account performs, after inbound replies.
 - Dry run prepares and records a comment but never posts it. Every posted comment, and every comment refused by either gate, is kept with its reason in the growth audit trail.