v4.9.0

• feat(core): full in-map posterior distribution as anchorPosterior (#244 residual) (#611) (26c9476)
• feat(mailwoman): coarse-placer soft prior default-on (#244) (#610) (6e0925d)
• test(eval): across-11 in-map misrouting gate — 0 misroutes (#244 default-on) (#609) (c4ed06d)
• feat(core): open-set reject rule for the coarse-placer (#244 M2) (#608) (b423b96)
• feat(core): coarse-placer soft country prior — full M1 (#244) (#606) (b5e682e)
• docs(plan): coarse-placer soft-country-prior wiring spec (#244) (#605) (adfafab)