[wess]

Release candidate

• Bump desktop and core to 1.12.0.
• Keep both sides of possible memory conflicts visible; hold only confirmed missing paths from session handoff.
• Bound drift scans and usage history, and improve Windows absolute path checks.
• Refresh installation and savings documentation. The optional server sync CLI and background worker are deferred.

Verification

• cargo test --locked in the root, synapsecore, and synapseserve workspaces.
• cargo check --locked --no-default-features in synapsecore.
• cargo build --locked in the root workspace.
• bun run check, bun run site, bun run sitecheck, and cargo fmt --all -- --check.
• Local Windows cross compile of synapsecore tests.
• 10,000-memory release benchmark: recall with drift median 51.37 ms over 20 runs.

The previous main CI run failed a Windows-only drift path test. This branch includes the path fix; Windows CI is the release gate before merging.