Validate script

Run every script rule and return the findings. Writes nothing, and unlike the other script endpoints it works on an active project — that is the one whose problems are reaching respondents right now.

With no body, validates the project's stored script in its real delivery context (answer zone, poll-ness, score buckets, post channel). valid: false then means the project will refuse to open or repost until the findings are fixed or accepted.

With a blocks array — the same body PUT /script takes — validates that candidate script instead, so a script can be checked before it is committed.

warnings holds only the ones not already accepted for this project; previously accepted ones are reported under accepted. A finding carrying blocks_write: true is one the write endpoints reject with a 400 even though the delivery gate would let an admin accept it.