fix: bump peerclaw-core to v0.6.2 for MessageTypeNotification

CI failed because peerclaw-core v0.6.1 does not include the
MessageTypeNotification constant added in the previous commit.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: gcmsg

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/google/uuid v1.6.0
 	github.com/lib/pq v1.11.2
 	github.com/mattn/go-sqlite3 v1.14.34
-	github.com/peerclaw/peerclaw-core v0.6.1
+	github.com/peerclaw/peerclaw-core v0.6.2
 	github.com/redis/go-redis/v9 v9.18.0
 	go.opentelemetry.io/otel v1.41.0
 	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.41.0

go.sum

@@ -41,6 +41,8 @@ github.com/peerclaw/peerclaw-core v0.6.0 h1:2Ng1dRgKo+Kg1/R9ybAWrIxX/Otc3veemQe3
 github.com/peerclaw/peerclaw-core v0.6.0/go.mod h1:nlxhZV5ClCDDAh11ubrTLFluae1fK7bLj3uyUk/Gc4A=
 github.com/peerclaw/peerclaw-core v0.6.1 h1:xacM1gXa0ypFC31nNCvqY+9dr2s4xxQb/mWhybMIgP8=
 github.com/peerclaw/peerclaw-core v0.6.1/go.mod h1:nlxhZV5ClCDDAh11ubrTLFluae1fK7bLj3uyUk/Gc4A=
+github.com/peerclaw/peerclaw-core v0.6.2 h1:NIxTcOisypXJ+CYJunCIUkKHpFcP9QeJrMbqn+sokuU=
+github.com/peerclaw/peerclaw-core v0.6.2/go.mod h1:nlxhZV5ClCDDAh11ubrTLFluae1fK7bLj3uyUk/Gc4A=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/redis/go-redis/v9 v9.18.0 h1:pMkxYPkEbMPwRdenAzUNyFNrDgHx9U+DrBabWNfSRQs=