[router] Move all protocols to spec.rs file (#9519)

sgl-router/src/protocols/common.rs

@@ -1,61 +0,0 @@
-// Common types shared across all protocol implementations
-
-use serde::{Deserialize, Serialize};
-
-/// Helper function for serde default value
-pub fn default_true() -> bool {
-    true
-}
-
-/// Common trait for all generation requests across different APIs
-pub trait GenerationRequest: Send + Sync {
-    /// Check if the request is for streaming
-    fn is_stream(&self) -> bool;
-
-    /// Get the model name if specified
-    fn get_model(&self) -> Option<&str>;
-
-    /// Extract text content for routing decisions
-    fn extract_text_for_routing(&self) -> String;
-}
-
-/// Helper type for string or array of strings
-#[derive(Debug, Clone, Deserialize, Serialize)]
-#[serde(untagged)]
-pub enum StringOrArray {
-    String(String),
-    Array(Vec<String>),
-}
-impl StringOrArray {
-    /// Get the number of items in the StringOrArray
-    pub fn len(&self) -> usize {
-        match self {
-            StringOrArray::String(_) => 1,
-            StringOrArray::Array(arr) => arr.len(),
-        }
-    }
-
-    /// Check if the StringOrArray is empty
-    pub fn is_empty(&self) -> bool {
-        match self {
-            StringOrArray::String(s) => s.is_empty(),
-            StringOrArray::Array(arr) => arr.is_empty(),
-        }
-    }
-
-    /// Convert to a vector of strings
-    pub fn to_vec(&self) -> Vec<String> {
-        match self {
-            StringOrArray::String(s) => vec![s.clone()],
-            StringOrArray::Array(arr) => arr.clone(),
-        }
-    }
-}
-
-/// LoRA adapter path - can be single path or batch of paths (SGLang extension)
-#[derive(Debug, Clone, Deserialize, Serialize)]
-#[serde(untagged)]
-pub enum LoRAPath {
-    Single(Option<String>),
-    Batch(Vec<Option<String>>),
-}