synth v0.73.0

What's Changed

• plan(v0.73): "Is it still broken?" — the pin debt as the headline, and MOVE THE ANCHOR to v0.72.0 by @avrabe in #1374
• RQ-73-PINDEBT (#1373): make a pin's ISSUE mean something — and the first thing it found by @avrabe in #1375
• RQ-73-FALCONFIXTURE (#1318): the reporter's module was attached to the issue all along by @avrabe in #1376
• RQ-73-ISLANDPASS (#1331): branch resolution and island placement, one fixed point by @avrabe in #1377
• RQ-73-SC5 (#345) + RQ-73-STEP8 (#1269): two things that existed but were not reached by @avrabe in #1378
• RQ-73-GATETRUTH (#1319): three corrections that did not do what they said by @avrabe in #1379
• RQ-73-CIPOOL (#1062) + RQ-73-ARCHMODEL (#1136), and cold review round 1 by @avrabe in #1380
• release(v0.73.0): "Is it still broken?" — the cut, and the corrections round 2 demanded by @avrabe in #1381

Full Changelog: v0.72.0...v0.73.0