synth v0.83.0

What's Changed

• v0.83 plan: 14 artifacts, and the anchor moved to v0.82.0 across all six sites at once by @avrabe in #1495
• v0.83 CANCELGAP lane (#1484): the states that answered NO to every question the gates asked by @avrabe in #1496
• v0.83 LANDEDBOTH lane (#1484): the acknowledgment asks for a different number before and after the squash by @avrabe in #1497
• v0.83 RANGEWIDEN (#965): the downstream surface MEASURED is zero, and the bump lands behind a tested refusal by @avrabe in #1498
• v0.83 PAGESIZE5 (#1441): (pagesize 1) is honoured on --relocatable, and the oracle switched itself by @avrabe in #1499
• v0.83 VARVEBUMP (#1422): the layer moves to its line's high-water, and the advisory job's flake is a deterministic anti-rollback refusal by @avrabe in #1500
• v0.83 FIRSTTOKEN2 + SWEEP + WIDEFILE6 + JESSDIVERGE5: four artifact-only lanes, four refutations, none claiming by @avrabe in #1503
• v0.83 WASTTRAIN (#465): the wasm-tools graph collapses from THREE upstream trains to TWO, and the survivor is a sibling's pin by @avrabe in #1504
• v0.83 release prep: bump the workspace to 0.83.0 and write the notes by @avrabe in #1505
• v0.83 cold review round 1: the record, and its seven corrections applied by @avrabe in #1506
• v0.83 cold review round 2: five false statements, four of them ours by @avrabe in #1507

Full Changelog: v0.82.0...v0.83.0