chore(dmq): update DMQ network magic

Author: jpraynaud

internal/mithril-dmq/src/model/network.rs

@@ -23,11 +23,11 @@ pub enum DmqNetwork {
 
 impl DmqNetwork {
     /// Mainnet magic ID
-    pub const MAINNET_MAGIC_ID: MagicId = 123; // TODO: Update magic ids for networks
+    pub const MAINNET_MAGIC_ID: MagicId = 3141592; // TODO: Update magic ids for networks
     /// Preprod magic ID
-    pub const PREPROD_MAGIC_ID: MagicId = 1; // TODO: Update magic ids for networks
+    pub const PREPROD_MAGIC_ID: MagicId = 3141592; // TODO: Update magic ids for networks
     /// Preview magic ID
-    pub const PREVIEW_MAGIC_ID: MagicId = 2; // TODO: Update magic ids for networks
+    pub const PREVIEW_MAGIC_ID: MagicId = 3141592; // TODO: Update magic ids for networks
     /// Devnet magic ID
     pub(crate) const DEVNET_MAGIC_ID: MagicId = 3141592; // TODO: Update magic ids for networks