Bump version to 1.6.3

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

crates/local_inference/src/lib.rs

@@ -0,0 +1,22 @@
+pub mod engine;
+pub mod tasks;
+
+use async_trait::async_trait;
+
+pub use engine::{CancellationToken, Device, GenerationConfig, InferenceEngine};
+pub use tasks::{
+    InputCategory, InputClassificationInput, InputClassificationResult, InputClassificationTask,
+    PromptSuggestionInput, PromptSuggestionTask, TabNamingInput, TabNamingTask,
+};
+
+#[async_trait]
+pub trait InferenceTask: Send + Sync {
+    type Input: Send;
+    type Output: Send;
+
+    async fn run(
+        &self,
+        engine: &InferenceEngine,
+        input: Self::Input,
+    ) -> anyhow::Result<Self::Output>;
+}