Add v3 onion seed nodes for network bootstrap

Added 5 new .onion v3 seed addresses:
- DNS3 main node
- 4 Docker-based seed nodes running on DNS2

Total seed count: 2 -> 7 onion seeds for improved
network connectivity and peer discovery.

src/onionseed.h

@@ -1,13 +1,19 @@
-
 #ifndef TRIANGLES_ONIONSEED_H
 #define TRIANGLES_ONIONSEED_H
 
 // hidden service seeds
 // v5 hard fork: v2 onion seeds removed (Tor v2 deprecated Oct 2021)
-// v3 onion seeds will be added when bootstrap nodes are deployed
+// v3 onion seeds - bootstrap nodes deployed 2026-03-30
 static const char *strMainNetOnionSeed[][1] = {
-    {"gxvrhv3qitnc6kobrhsrse46bmcfitnybapor3or3oczzuxn6hfzxyid.onion"},
-    {"futmtrvh6j34t7s6yjdxfia6iwuyfzwh4k5eqfof5kfhoqk3xmi3qoqd.onion"},
+    // Main nodes
+    {"gxvrhv3qitnc6kobrhsrse46bmcfitnybapor3or3oczzuxn6hfzxyid.onion"},   // DNS2
+    {"futmtrvh6j34t7s6yjdxfia6iwuyfzwh4k5eqfof5kfhoqk3xmi3qoqd.onion"},   // Original seed
+    {"i6tk7soznftvoibtskwlezviskiererhjndpsmrff4kaxw7jnd5izfqd.onion"},     // DNS3
+    // Docker seed nodes
+    {"sgn3pus7ssrwbhidvsu5dav3titilzz7mplclvslfuisduy3v7boqiid.onion"},     // seed-1
+    {"hjveej4qjjm2npaxshse7qnrgbqsdyu67io6erdw5ihdil377552xsqd.onion"},     // seed-2
+    {"krqbt7oyizmjp72oo6oiu6rcf7trxz5rpynjfx6whgavtpf4tkjaajyd.onion"},     // seed-3
+    {"pjhodbrj3swqyj33ezkhyr4mz4f5x4xcueim4mwlybjlragmzruwheid.onion"},     // seed-4
     {NULL}
 };