add CDEF testnet validator file. (#921)

* add CDEF testnet validator file.

* Update 0341317de792e1f2220e9a680e90bb7ee80e2987a92bd32596dcd0913e66123cd0.json

Author: taka-intpe

testnet/0341317de792e1f2220e9a680e90bb7ee80e2987a92bd32596dcd0913e66123cd0.json

@@ -0,0 +1,10 @@
+{
+  "id": 256,
+  "name": "CDEF,Inc.",
+  "secp": "0341317de792e1f2220e9a680e90bb7ee80e2987a92bd32596dcd0913e66123cd0",
+  "bls": "b9128e24f05dca66d92b81b1c1e1d3534e9383e377ebe442443659dde5239a12533325408ce4af97c88f41ccb0ba9117",
+  "website": "https://cdef-inc.com",
+  "description": "CDEF is a design engineering company, embedded software and security.",
+  "logo": "https://cdef-inc.com/wp-content/uploads/2026/04/logoL.png",
+  "x": "https://x.com/0x0000Cdef"
+}