Compose memberships with a carried holder's own seat events (issue 1952)

The grants part composes every membership and runtime grant from
mesh-sdk, which now lists a held seat's events for its holder, so the
self-check the tool runner carries can say `checked`. Pinned to that
mesh-sdk head.

Quick vs thorough: quick, these fixes for L4's take-over now; the
thorough fix (research 032 / ADR 0240's health view extension) is
decided later.

Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL

modules/mesh-grants/go.mod

@@ -3,7 +3,7 @@ module mesh-grants
 go 1.26.0
 
 require (
-	git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261031084708-acbf80ad910a
+	git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261031203031-cbbfbf3d2d55
 	github.com/nats-io/nats.go v1.54.0
 )
 

modules/mesh-grants/go.sum

@@ -1,5 +1,5 @@
-git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261031084708-acbf80ad910a h1:DcSvfEmdPBKqCg5OmXRNb269EkkPe7BsEp+RykEhkgE=
-git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261031084708-acbf80ad910a/go.mod h1:ouERNpZizzwZ0HLEtAypsY9FR20FyUgUYRni6J7kVCY=
+git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261031203031-cbbfbf3d2d55 h1:OcKTrlH72cPwAHuyAwyRLjGz0qt4VHTeal4MeahPnBM=
+git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261031203031-cbbfbf3d2d55/go.mod h1:ouERNpZizzwZ0HLEtAypsY9FR20FyUgUYRni6J7kVCY=
 github.com/antithesishq/antithesis-sdk-go v0.7.0-default-no-op h1:Z/MZK75wC/NSrkgqeNIa7jexam9uWzhLmFTSCPI/kn0=
 github.com/antithesishq/antithesis-sdk-go v0.7.0-default-no-op/go.mod h1:FQyySiasQQM8735Ddel3MRojmy4dA1IqCeyJ5jmPMbI=
 github.com/google/go-tpm v0.9.8 h1:slArAR9Ft+1ybZu0lBwpSmpwhRXaa85hWtMinMyRAWo=