build: upgrade Electron and SQLite native runtime

[AmagiDDmxh]

Why

The app was on Electron 34, outside Electron's latest-three-major support window, while the shared native database dependency remained on better-sqlite3 11. The two upgrades need to move together because Spool uses the same addon from Electron, Node-based tests, and the CLI.

better-sqlite3 12 drops EOL Node/Electron targets, supports Node 20-26, and contains the V8 compatibility needed by current Electron releases. This PR treats the change as one native-runtime migration rather than an automated dependency bump.

What changed

• Upgrade Electron from 34.5.8 to 43.1.1.
• Upgrade the single workspace better-sqlite3 version from 11.10.0 to 12.11.1 across app, core, and CLI.
• Upgrade @electron/rebuild to 4.2.0, @electron/asar to 4.2.0, and electron-builder to 26.15.3.
• Require Node >=22.12 for the development toolchain.
• Declare Node 22 types directly in share-backend, which imports Node test APIs, instead of imposing a repository-wide type override.
• Let @electron/rebuild resolve its compatible node-abi 4.33.0 through the lockfile; no transitive override is required for Electron 43 ABI 148.
• Print Electron, bundled Node, V8, and module ABI before the native smoke loads the addon.

Verification

• Frozen and regular pnpm install both passed without changing the lockfile.
• All 13 workspace typecheck tasks passed.
• Type-aware Oxlint passed.
• Core: 417 passed, 1 skipped.
• App: 450 passed in the full unit run used for the migration; the review rerun also passed 422 tests before two existing fixed-timeout build/load checks exceeded their local budgets under system load.
• Share backend: 250 passed, including the deployment test that previously exposed mixed Node URL declarations.
• Native smoke passed on Electron 43.1.1 / Node 24.18.0 / V8 15.0 / ABI 148, then restored and loaded the addon under local Node ABI 137.
• The two security specs that hit teardown contention in the full local E2E run passed 3/3 with one Playwright worker, including app cleanup.
• macOS arm64 packaging completed; deep strict codesign verification passed.
• The packaged-app smoke passed indexing/search, packaged SQLite, Claude/Codex ACP assets, Security Scan, and purge.
• The amended PR head passed Ubuntu unit, Ubuntu E2E, and macOS E2E.

Size and timing

• App bundle: 643.9 MB, up from the Stacked features 6: package size #417 baseline of 601.7 MB (+42.2 MB).
• Electron Framework: 273.9 MB, up from approximately 232 MB.
• DMG and ZIP: approximately 224 MB each.
• Local signed package run: approximately 11 minutes, mostly resource signing in the newer Electron Framework; release CI retains a 30-minute budget.