Speed up Definition of Done and prepare 1.0.51

[stozo04]

What changed

• Run Markdown, link, harness, script, spelling, JSON, dictionary, and secret gates before Gradle so cheap failures surface first.
• Merge debug/release assembly, Android Lint, and JVM tests into one cached, parallel Gradle invocation with --continue; lint and JUnit gates parse that run's fresh reports.
• Make clean opt-in via -Clean, record every gate's durationSec, and record whether the build was clean in the receipt.
• Pin the three Node text tools in package-lock.json and use the local binaries in both PowerShell and CI.
• Make Pixel 8 the full default device sweep; keep Fold and API 34 as risk-triggered lanes, with API 34 mandatory for every release.
• Add one lightweight orchestration contract check and fix JSON validation so valid npm lockfiles with an empty root-package key are accepted.
• Bump the app to versionName 1.0.51 / versionCode 51 so /cut-release can resume from merged main.

Measured result

Run	Command / scope	Wall time	Result
Current-main control (41a1e4d)	pre-pr-sweep -SkipConnected -SkipInspectCode	279.5s	647 JVM tests green
Optimized warm	same scope	25.4s	647 JVM tests green; 11.0x faster / 90.9% less time
Optimized clean	-Clean -SkipConnected -SkipInspectCode	47.4s	647 JVM tests green; 5.9x faster / 83.0% less time
Broad full sweep (81eccc7)	-Clean -SkipInspectCode, Pixel 8 attached	412.0s	full sweep green

The broad full-sweep receipt attributes the 412.0s instead of hiding it: text/static 27.0s, clean merged build 17.3s, onboarding UI loops 182.6s, and connected tests 183.4s. The remaining runtime is real device coverage, not repeated JVM/lint builds.

Regression proof

• Deliberate misspelling: gate 7 red in 3.7s; whole sweep red in 13.8s; no receipt written.
• Deliberate failing JVM class: merged Gradle run remained red, gate 3 still reported lint, and gate 4 reported 648 tests / 1 failure because --continue ran both.
• After deleting that class: next run reported exactly 647 tests / 0 failures, proving stale XML was removed.
• Full clean-tree sweep receipt matched 81eccc77adf47dd001a5994c4b14d09d69f3b0e5, with cleanBuild=true, connected=true, and onboardingLoop=passed. Narrow follow-ups updated setup-python and restored the signing guide to main; the final release-metadata change then passed a clean rebuild, 647 JVM tests, and a final-head receipt at 77100e5. Those focused edits do not invalidate the earlier app/device evidence.

Release preparation

• Source: versionCode = 51, versionName = "1.0.51".
• Built APK: aapt dump badging reports versionCode='51' versionName='1.0.51'.
• First cache-miss rebuild after the version change: 196.5s, green. After that populated the current-head cache, an independently verified gradlew clean followed by the sweep completed in 34.4s with 647/647 JVM tests green.

Final coverage

• 647 JVM tests, 0 failures/errors
• 123 connected Android tests, 0 failures/errors
• Five autonomous Pixel 8 loops: lenses, onboarding, photo mode, record clip, reverse preview with a nonzero trim
• 24 native libraries pass 16 KB alignment
• 195 Markdown files linted; all 7 changed Markdown files link-checked
• 0 hard Android Lint findings; 0 spelling, harness-drift, JSON, dictionary, tracked-file, or Gitleaks findings

Android Studio Inspect Code was unavailable in this unattended run and is explicitly recorded as skipped; the owner still runs it before merge.

Fixes #174

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Note

Medium Risk
Touches CI/sweep orchestration, Gradle caching/configuration-cache settings, and release versioning; behavioral app changes are minimal but a mis-tuned sweep or cache could mask stale build artifacts without -Clean.

Overview
Speeds up the Definition of Done by reordering pre-pr-sweep.ps1 so cheap text/static gates run before Gradle, merging debug/release assembly, Android Lint, and JVM tests into one cached parallel Gradle invocation (with optional -Clean), and enriching build/sweep-receipt.json with per-gate durations and whether a clean build ran.

Pins Tier-3 Node tools (markdownlint-cli2, markdown-link-check, cspell) via package-lock.json and npm ci in CI and locally (root node_modules/ gitignored); CI bumps setup-python to v7 and drops npx --yes in favor of local binaries. Gradle enables configuration cache, build cache, and parallel execution in gradle.properties.

Narrows default emulator E2E guidance from a mandatory four-AVD sweep to Pixel 8 by default, with Pixel 10 Pro Fold and Pixel 8 API 34 only for posture/preview or FGS/WorkManager/release risks—updated across harness skills and OEM/testing docs.

Release prep: bumps to versionCode 51 / versionName 1.0.51.

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