v0.7.2

Bugfix release: tesserae sessions discover now returns even with tens of GB of agent-session history (marker pre-filter ~50× cheaper than JSON parsing, symlinked-account-root dedup, mtime-keyed scan cache — measured never-returns → 1m26s warm); LLM CLI calls (codex exec / claude -p) run in their own process group and a timeout kills the whole group, so a timed-out call can no longer wedge a compile at 0% CPU behind orphaned grandchildren; compiles take a per-project flock on .tesserae/compile.lock so hook-triggered refreshes fail fast instead of stacking (TESSERAE_COMPILE_LOCK_WAIT to wait); and tesserae --version/-V prints the installed version, which also leads the root help.

Full notes: docs/release-notes/v0.7.2.md