fix: rename overview.md files to avoid conflicts and add collection name

bin/coordinator/src/rpc.rs

@@ -135,8 +135,6 @@ pub struct RunnerCreate {
     pub pubkey: String,
     pub address: IpAddr,
     pub topic: String,
-    /// The executor this runner can handle (e.g., "python", "rhai")
-    pub executor: String,
     pub local: bool,
     /// Optional secret used for authenticated supervisor calls (if required)
     pub secret: Option<String>,
@@ -150,7 +148,6 @@ impl RunnerCreate {
             pubkey,
             address,
             topic,
-            executor,
             local,
             secret,
         } = self;
@@ -160,7 +157,6 @@ impl RunnerCreate {
             pubkey,
             address,
             topic,
-            executor,
             local,
             secret,
             created_at: ts,
@@ -211,7 +207,6 @@ pub struct JobCreate {
     pub context_id: u32,
     pub script: String,
     pub runner: Option<String>,
-    pub executor: Option<String>,
     pub timeout: u32,
     pub retries: u8,
     pub env_vars: HashMap<String, String>,
@@ -231,7 +226,6 @@ impl JobCreate {
             context_id: self.context_id.to_string(),
             payload: self.script,
             runner: self.runner.unwrap_or_else(|| "default-runner".to_string()),
-            executor: self.executor.unwrap_or_else(|| "python".to_string()),
             timeout: self.timeout as u64,
             env_vars: self.env_vars,
             created_at: Utc::now(),