chore: upgrade Rust toolchain to 1.89 and modernize code with let-chains

.github/workflows/Dockerfile.dev

@@ -1,5 +1,5 @@
 # Keep tracking base image
-FROM rust:1.85-slim-bookworm
+FROM rust:1.89-slim-bookworm
 
 # Set needed env path
 ENV PATH="/opt/armv7l-linux-musleabihf-cross/:/opt/armv7l-linux-musleabihf-cross/bin/:/opt/aarch64-linux-musl-cross/:/opt/aarch64-linux-musl-cross/bin/:/opt/x86_64-linux-musl-cross/:/opt/x86_64-linux-musl-cross/bin/:$PATH"

.github/workflows/docker-build-static.yml

@@ -24,7 +24,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
-
+  MSRV: "1.89"
 
 ### CI Docs
 
@@ -88,6 +88,12 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v5.0.0
+      - name: Install Rust
+        id: toolchain
+        uses: dtolnay/rust-toolchain@master
+        with:
+            toolchain: "${{ env.MSRV }}"
+            targets: "wasm32-unknown-unknown"
       - uses: actions/cache@v4
         with:
           path: |
@@ -99,8 +105,6 @@ jobs:
           key: lldap-ui-${{ hashFiles('**/Cargo.lock') }}
           restore-keys: |
             lldap-ui-
-      - name: Add wasm target (rust)
-        run: rustup target add wasm32-unknown-unknown
       - name: Install wasm-pack with cargo
         run: cargo install wasm-pack || true
         env:
@@ -133,6 +137,12 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v5.0.0
+      - name: Install Rust
+        id: toolchain
+        uses: dtolnay/rust-toolchain@master
+        with:
+            toolchain: "${{ env.MSRV }}"
+            targets: "${{ matrix.target }}"
       - uses: actions/cache@v4
         with:
           path: |

.github/workflows/rust.yml

@@ -8,7 +8,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
-  MSRV: 1.85.0
+  MSRV: "1.89"
 
 jobs:
   pre_job:
@@ -42,7 +42,7 @@ jobs:
             toolchain: "${{ env.MSRV }}"
       - uses: Swatinem/rust-cache@v2
       - name: Build
-        run: cargo build --verbose --workspace
+        run: cargo +${{steps.toolchain.outputs.name}} build --verbose --workspace
       - name: Run tests
         run: cargo +${{steps.toolchain.outputs.name}} test --verbose --workspace
       - name: Generate GraphQL schema