fix(deps): repin luxfi/age v1.5.0 -> v1.5.1 (cold-cache checksum SECURITY ERROR)

luxfi/age v1.5.0 was upstream-retagged (transient files GC'd from the tag
tree), so the tag's zip content on the origin no longer matches the h1 hash
recorded in go.sum. Cold-cache builds (fresh CI, empty GOMODCACHE) fail with:

    verifying github.com/luxfi/age@v1.5.0: checksum mismatch
    SECURITY ERROR

v1.5.1 dereferences the same commit, is immutable, and is sum.golang.org
verified (h1:Gj8iHMMi0lGkKT/mlXV2HVBr2m3vt2v0eKVsTMTtAQM=). Surgical: age
require + go.sum only. go mod verify clean.

Author: Hanzo AI

go.mod

@@ -22,7 +22,7 @@ require (
 	github.com/hanzoai/tygoja v0.0.2
 	github.com/hashicorp/golang-lru/v2 v2.0.7
 	github.com/jackc/pgx/v5 v5.9.1
-	github.com/luxfi/age v1.5.0
+	github.com/luxfi/age v1.5.1
 	github.com/luxfi/cache v1.2.1
 	github.com/luxfi/consensus v1.25.15
 	github.com/luxfi/fhe v1.8.2

go.sum

@@ -328,8 +328,9 @@ github.com/luxfi/accel v1.2.2 h1:IzG1qUogapr4/KbbHP9avAimu3ioGJqh67WYKHxfZys=
 github.com/luxfi/accel v1.2.2/go.mod h1:5IvpNMfw9FgeBB9oobp+jbauAdhapfhc2bHYPUsHL9Y=
 github.com/luxfi/address v1.0.1 h1:Sc4keyuVzBIvHr7uVeYZf2/WY9YDGUgDi/iiWenj49g=
 github.com/luxfi/address v1.0.1/go.mod h1:5j3Eh66v9zvv1GbNdZwt+23krV8JlSDaRzmWZU8ZRM0=
-github.com/luxfi/age v1.5.0 h1:G69HbSV4R3vKEH9B0CulnRaMdSdf4RalMgP8xKmxHeI=
 github.com/luxfi/age v1.5.0/go.mod h1:iAYAxgvrXxcy746+Ovh/eWWDuF9teJLNcCSSOX9RYW0=
+github.com/luxfi/age v1.5.1 h1:Gj8iHMMi0lGkKT/mlXV2HVBr2m3vt2v0eKVsTMTtAQM=
+github.com/luxfi/age v1.5.1/go.mod h1:iAYAxgvrXxcy746+Ovh/eWWDuF9teJLNcCSSOX9RYW0=
 github.com/luxfi/atomic v1.0.0 h1:xUV60MuzRvXngaQ1sM0yVC2v4TRoLlUGkkH7M9PS4yw=
 github.com/luxfi/atomic v1.0.0/go.mod h1:0G2mTlQ6TXWHICUHrUUPu1/qAiIyR4gSZ2tva9ci/bI=
 github.com/luxfi/cache v1.2.1 h1:kAzOS55/hmYeNKR+0HAKv4ma48Y6JjkI8UQeqdZ8bfI=