Post-v0.7.20: fix cross-node create-from-snapshot on the containerd engine, plus harness/sim reliability.

Highlights:

• UC-21 snapshot push (PR #358) — livePush now tries [source, source:latest] for tagless refs (same fallback as create/pull). CreateSnapshot commits <name>:latest, but the reconciler passed bare <name>; containerd GetImage is exact-match, so every cluster snapshot push failed with image not found and derived creates on other nodes never got the image from AOCR. Single-node was unaffected. Idempotency / boot-path unchanged.
• SLESS-01 (PR #357) — serverless-wake sim prefixes /http-echo in ContainerCommand argv[0] (bare flags were exec'd as the program).
• Bench — tighter per-sample teardown in TestBenchCreateLatency so multi-runtime sweeps don't starve placement.
• Dependabot: astro 7, setup-go/node 7, containerd/api, sqlite3, x/sys, docs fonts/tailwind, tsx.

What's Changed

• fix(sims): serverless-wake http-echo needs binary in argv[0] (SLESS-01) by @sumansaurabh in #357
• fix(containerd): snapshot push resolves the :latest-tagged local image (UC-21) by @sumansaurabh in #358
• chore(deps): bump actions/setup-node from 6 to 7 by @dependabot in #345
• chore(deps): bump golang.org/x/sys from 0.46.0 to 0.47.0 by @dependabot in #346
• chore(deps): bump actions/setup-go from 6 to 7 by @dependabot in #347
• chore(deps): bump @fontsource/ibm-plex-sans-condensed in /docs by @dependabot in #348
• chore(deps): bump tailwindcss from 4.3.2 to 4.3.3 in /docs by @dependabot in #350
• chore(deps-dev): bump tsx from 4.22.4 to 4.23.1 in /sdk/typescript by @dependabot in #351
• chore(deps): bump @fontsource/space-mono from 5.2.9 to 5.3.0 in /docs by @dependabot in #352
• chore(deps): bump github.com/containerd/containerd/api by @dependabot in #353
• chore(deps): bump github.com/mattn/go-sqlite3 from 1.14.47 to 1.14.48 by @dependabot in #354
• chore(deps): bump astro from 6.4.8 to 7.1.3 in /docs by @dependabot in #356

Full Changelog: v0.7.20...v0.7.21

What's Changed

• fix(sims): serverless-wake http-echo needs binary in argv[0] (SLESS-01) by @sumansaurabh in #357
• chore(deps): bump actions/setup-node from 6 to 7 by @dependabot[bot] in #345
• chore(deps): bump golang.org/x/sys from 0.46.0 to 0.47.0 by @dependabot[bot] in #346
• chore(deps): bump @fontsource/ibm-plex-sans-condensed from 5.2.8 to 5.3.0 in /docs by @dependabot[bot] in #348
• chore(deps): bump github.com/mattn/go-sqlite3 from 1.14.47 to 1.14.48 by @dependabot[bot] in #354
• chore(deps): bump github.com/containerd/containerd/api from 1.8.0 to 1.11.1 by @dependabot[bot] in #353
• chore(deps): bump @fontsource/space-mono from 5.2.9 to 5.3.0 in /docs by @dependabot[bot] in #352
• chore(deps-dev): bump tsx from 4.22.4 to 4.23.1 in /sdk/typescript by @dependabot[bot] in #351
• chore(deps): bump tailwindcss from 4.3.2 to 4.3.3 in /docs by @dependabot[bot] in #350
• chore(deps): bump actions/setup-go from 6 to 7 by @dependabot[bot] in #347
• fix(containerd): snapshot push resolves the :latest-tagged local image (UC-21) by @sumansaurabh in #358
• chore(deps): bump astro from 6.4.8 to 7.1.3 in /docs by @dependabot[bot] in #356

Full Changelog: v0.7.20...v0.7.21