v0.2.2 — community bug-fix round

Fixes from the first wave of external issue reports (thanks @davieshq, @rcollette). No behavior changes beyond the fixes — extension.id stays linear, so commands are unchanged.

• #33 / #39 / #40 — seed no longer writes a duplicate default_state_uuids key into linear-config.yml; the managed UUID blocks update in place, so the file stays valid single-key YAML and formats cleanly.
• #36 — the reconcile summary now counts created issues/sub-issues correctly (they were being lost to a subshell → Created: 0).
• #35 — pull and status now surface the "malformed config" diagnostic instead of exiting with a silent code 2.
• #42 — removed the hardcoded README-anchor links from generated issue descriptions (dead links in any consumer repo).
• #34 — push now warns on ## Phase N headings not in the ## Phase N: form (previously skipped silently → 0 sub-issues).

Install / upgrade: nothing required for existing users. Catalog users — the listing is being bumped to this version.