v5.5.4: Add hardcoded seed nodes for automatic network mesh

- Hardcoded DNS3 (74.208.167.19), DNS2 (194.233.88.206), and Contabo (100.98.123.59) as fixed seeds
- Nodes will automatically connect to these on first run
- No manual addnode configuration needed
- Full mesh network connectivity built into the code

src/net.cpp

@@ -1389,9 +1389,12 @@ void ThreadOnionSeed(void* parg)
 
 
 
-// Hardcoded seeds removed - peer discovery is now fully dynamic via HTTP seed list.
-// See: seeds.cryptographic-triangles.org
+// Hardcoded seed nodes - full network mesh
+// These nodes will be automatically connected to on first run
 unsigned int pnSeed[] = {
+    0x4ad0a713, // 74.208.167.19 (DNS3)
+    0xc2e958ce, // 194.233.88.206 (DNS2)
+    0x64627b3b, // 100.98.123.59 (Contabo seed server)
 };
 
 void DumpAddresses()