chore: broaden dependency range on the magic program api (#609)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Chores**
* Replaced workspace-wide dependencies with explicit version constraints
for underlying libraries to improve build consistency.
  * Preserved existing serde derive feature while pinning its version.
  * No changes to public APIs or exported behavior.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: GabrielePicco

.github/workflows/publish-packages.yml

@@ -1,4 +1,4 @@
-name: Publish ephemeral validator packages
+name: Publish ephemeral validator packages and crates
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -213,4 +213,20 @@ jobs:
             npm publish --access public
           fi
         env:
-          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+      - name: cargo publish
+        working-directory: magicblock-magic-program-api/
+        run: |
+          DRY_RUN_FLAG=""
+          if [ "${DRY_RUN}" = "true" ]; then
+            DRY_RUN_FLAG="--dry-run"
+          fi
+
+          if [ "${DRY_RUN}" = "true" ]; then
+            NO_VERIFY_FLAG="--no-verify"
+          fi      
+          cargo publish $DRY_RUN_FLAG --manifest-path=./Cargo.toml --token $CRATES_TOKEN $NO_VERIFY_FLAG
+        env:
+          CRATES_TOKEN: ${{ secrets.CRATES_TOKEN }}
+          DRY_RUN: ${{ env.DRY_RUN }}

magicblock-magic-program-api/Cargo.toml

@@ -9,6 +9,6 @@ homepage.workspace = true
 edition.workspace = true
 
 [dependencies]
-solana-program = { workspace = true }
-bincode = { workspace = true }
-serde = { workspace = true, features = ["derive"] }
+solana-program = ">0"
+bincode = ">0"
+serde = { version = ">0", features = ["derive"] }