style: rustfmt the v0.4.0 release surface

The v0.4.0 work added many new modules across atomr-accel-py and
extended atomr-accel-tensorrt's actor.rs with FFI shims; rustfmt
reformats long error-string literals onto multi-line forms and
normalizes some let-bindings. CI's rustfmt --check gate caught the
delta on the v0.4.0 commit.

No semantic changes; cargo check --workspace passes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: cognect

.claude/scheduled_tasks.lock

@@ -0,0 +1 @@
+{"sessionId":"1821cead-17cd-4dc6-9170-34f0bc4e8544","pid":2294431,"procStart":"16488581","acquiredAt":1778276092565}

crates/atomr-accel-cuda/src/device/context_actor.rs

@@ -212,29 +212,33 @@ impl ContextActor {
             let mut children = KernelChildren::new(stub);
             #[cfg(feature = "cusolver")]
             {
-                if self.config.enabled_libraries.contains(EnabledLibraries::CUSOLVER) {
+                if self
+                    .config
+                    .enabled_libraries
+                    .contains(EnabledLibraries::CUSOLVER)
+                {
                     let solver_stub = ctx
                         .spawn::<crate::kernel::SolverActor>(
                             crate::kernel::SolverActor::mock_props(),
                             "solver",
                         )
-                        .unwrap_or_else(|e| {
-                            panic!("Unrecoverable: spawn mock SolverActor: {e}")
-                        });
+                        .unwrap_or_else(|e| panic!("Unrecoverable: spawn mock SolverActor: {e}"));
                     children.solver = Some(solver_stub);
                 }
             }
             #[cfg(feature = "nvrtc")]
             {
-                if self.config.enabled_libraries.contains(EnabledLibraries::NVRTC) {
+                if self
+                    .config
+                    .enabled_libraries
+                    .contains(EnabledLibraries::NVRTC)
+                {
                     let nvrtc_stub = ctx
                         .spawn::<crate::kernel::NvrtcActor>(
                             crate::kernel::NvrtcActor::mock_props(),
                             "nvrtc",
                         )
-                        .unwrap_or_else(|e| {
-                            panic!("Unrecoverable: spawn mock NvrtcActor: {e}")
-                        });
+                        .unwrap_or_else(|e| panic!("Unrecoverable: spawn mock NvrtcActor: {e}"));
                     children.nvrtc = Some(nvrtc_stub);
                 }
             }