refactor: extract function for better code reuse in interal

unit-picker/src/main/kotlin/cc/unitmesh/pick/worker/base/LangWorker.kt

@@ -81,24 +81,42 @@ interface LangWorker {
             }
         }
 
-        val result = jobs.map { job ->
-            val jobContext = contextFromJob(job, workerContext)
+        val result = executeJob().map {
+            outputFile.appendText(it.toString() + "\n")
+            it
+        }
 
-            val flatten = workerContext.codeContextStrategies.map { type ->
-                type.builder(jobContext).build()
-            }.flatten()
+        return@coroutineScope result
+    }
 
-            flatten.map {
-                outputFile.appendText(it.toString() + "\n")
-            }
+    /**
+     * Executes a job and returns a list of typed instructions.
+     *
+     * This method iterates over the list of jobs and creates a job context for each job using the provided worker context.
+     * It then iterates over the code context strategies of the worker context and builds a list of typed instructions
+     * using the job context and each code context strategy. The resulting list of typed instructions is flattened and returned.
+     *
+     * @return a list of typed instructions generated by executing the jobs
+     */
+    fun executeJob(): List<TypedIns> {
+        return jobs.map { job ->
+            val jobContext = createJob(job, workerContext)
 
-            flatten
+            workerContext.codeContextStrategies.map { type ->
+                type.builder(jobContext).build()
+            }.flatten()
         }.flatten()
-
-        return@coroutineScope result
     }
 
-    fun contextFromJob(job: InstructionFileJob, workerContext: WorkerContext) = JobContext(
+    /**
+     * Creates a JobContext object based on the given InstructionFileJob and WorkerContext.
+     *
+     * @param job The InstructionFileJob object representing the job to be processed.
+     * @param workerContext The WorkerContext object containing the context information for the worker.
+     * @return A JobContext object containing the job, quality types, file tree, output configuration, completion types,
+     *         maximum completion in one file, project context, and quality threshold.
+     */
+    fun createJob(job: InstructionFileJob, workerContext: WorkerContext) = JobContext(
         job,
         workerContext.qualityTypes,
         fileTree,