Release 0.3.0

What's Changed

• docs(adr): record mif-rh packaging and stdio-only transport decisions by @zircote in #21
• bench(mif-rh): manual M2 review benchmark with seeded real-corpus results by @zircote in #22
• fix(mif-rh-mcp): corpus_stats fails explicitly on a missing reports directory by @zircote in #24
• ci: make rht parity a fail-closed CI gate by @zircote in #20
• test(mif-rh): M3 cross-topic search eval over known-similar pairs by @zircote in #27
• feat(mif-ontology): confidence-tiered entity-type classification capability (MIF ADR-020) by @zircote in #25
• test(mif-rh-cli): binary-level parity tests and the Windows relationship-script failure path by @zircote in #28
• feat(mif-rh): tier-2 suggestion queue, tier-3 miss clustering, and calibrate by @zircote in #26
• ci: bump the rht pin and make the M3 search eval fail-closed by @zircote in #29
• chore(release): v0.3.0 by @zircote in #30

Full Changelog: v0.2.0...v0.3.0