Apply the PF1e per-turn action budget (CRB Actions in Combat: one
standard + one move, or one full-round in place of both, plus one
swift) unconditionally to every sequence a policy returns, not only
the immediate/staggered/nauseated specializations.
- _action_economy_filter: greedy in-order walk keeping the earliest
legal prefix-subsequence; a full-round action is only kept while
both the standard and move slots are still free.
- Exhaustive kind->slot classification (standard / move / swift /
full_round / free-conditional) over the Action.kind Literal,
documented and locked by tests.
- Surplus actions dropped and reported as
ActionResult(ok=False, reason="downgraded:action_economy") via a
multiset drop diff (reports duplicate-kind surplus the set-based
_dropped_kinds cannot).
- Composition order: general budget first, then the existing
immediate/staggered/nauseated filters (unchanged).
- default_policy untouched and its turns verified legal by the
validator; golden transcripts byte-identical.
