synth v0.70.0

What's Changed

• plan(v0.70): scope the release — "Evidence you can re-derive" (7 artifacts, every candidate measured against source first) by @avrabe in #1336
• RQ-70-ALIAS (#1321): VCR-RA-003 policed a wasm LOCAL'S frame home with a spill slot's single-value rule — cpetig's export emits by @avrabe in #1338
• RQ-70-NPA (#1331): static-data f32 relocation, the four gate-potency lanes, two deferrals measured, and the v0.70 steps-1-2 filing by @avrabe in #1340
• chore(deps): bump clap from 4.6.6 to 4.6.7 by @dependabot[bot] in #1342
• chore(deps): bump scry-sai-core from 3.2.7 to 3.3.0 by @dependabot[bot] in #1345
• chore(deps): bump taiki-e/install-action from 2.87.11 to 2.87.15 by @dependabot[bot] in #1347
• release(v0.70.0): "Evidence you can re-derive" — 9 artifacts, plus the cold review corrections that did not land by @avrabe in #1348

Full Changelog: v0.69.0...v0.70.0