fix: store ProcessResult artifact for every shell tool outcome, not only FATAL

Move ProcessResult artifact content storage into dispatchToolCalls so it
fires for all outcomes (success, ERROR, FATAL) — the spec mandates the
artifact MUST always be produced.

- dispatchToolCalls now stores ProcessResult JSON in CAS + cache for
  every tool call result, using the current toolCall's function.arguments
  as the command field (not firstOrNull)
- Replace storeFailedProcessResult with emitProcessResultEvents — event
  emission only, content already stored by dispatchToolCalls
- FATAL and ERROR branches both now emit artifact lifecycle events,
  fixing the gap where retryable ToolResult.Failure produced no artifact

core/kernel/src/main/kotlin/com/correx/core/kernel/orchestration/SessionOrchestrator.kt

@@ -239,11 +239,11 @@ abstract class SessionOrchestrator(
             inferenceResult.response.finishReason is FinishReason.ToolCall &&
             toolRounds < MAX_TOOL_ROUNDS
         ) {
-            val toolEntries = dispatchToolCalls(sessionId, stageId, inferenceResult.response.toolCalls)
+            val toolEntries = dispatchToolCalls(sessionId, stageId,
+                inferenceResult.response.toolCalls, stageConfig)
             val fatalEntry = toolEntries.firstOrNull { it.content.startsWith("FATAL:") }
             if (fatalEntry != null) {
-                storeFailedProcessResult(sessionId, stageId, stageConfig,
-                    inferenceResult.response.toolCalls, fatalEntry)
+                emitProcessResultEvents(sessionId, stageId, stageConfig)
                 return StageExecutionResult.Failure(
                     fatalEntry.content.removePrefix("FATAL: "),
                     retryable = false,
@@ -251,6 +251,7 @@ abstract class SessionOrchestrator(
             }
             val errorEntry = toolEntries.firstOrNull { it.content.startsWith("ERROR:") }
             if (errorEntry != null) {
+                emitProcessResultEvents(sessionId, stageId, stageConfig)
                 return StageExecutionResult.Failure(
                     errorEntry.content.removePrefix("ERROR: "),
                     retryable = true,
@@ -299,8 +300,10 @@ abstract class SessionOrchestrator(
         sessionId: SessionId,
         stageId: StageId,
         toolCalls: List<ToolCallRequest>,
+        stageConfig: StageConfig,
     ): List<ContextEntry> {
         val executor = toolExecutor ?: return emptyList()
+        val processResultSlots = stageConfig.produces.filter { it.kind.id == "process_result" }
         return toolCalls.flatMap { toolCall ->
             val invocationId = ToolInvocationId(UUID.randomUUID().toString())
             val parameters = runCatching {
@@ -391,6 +394,32 @@ abstract class SessionOrchestrator(
                 emit(sessionId, OrchestrationResumedEvent(sessionId, stageId))
             }
             val result = executor.execute(request)
+
+            // Store ProcessResult artifact for every shell execution outcome
+            for (slot in processResultSlots) {
+                val processResult = when (result) {
+                    is ToolResult.Success -> ProcessResultArtifact(
+                        status = "success",
+                        command = toolCall.function.arguments,
+                        exitCode = result.exitCode,
+                        stdout = result.output,
+                        stderr = result.metadata["stderr"] ?: "",
+                        durationMs = 0,
+                    )
+                    is ToolResult.Failure -> ProcessResultArtifact(
+                        status = "failed",
+                        command = toolCall.function.arguments,
+                        exitCode = -1,
+                        stdout = "",
+                        stderr = result.reason,
+                        durationMs = 0,
+                    )
+                }
+                val jsonContent = Json.encodeToString(ProcessResultArtifact.serializer(), processResult)
+                artifactStore.put(jsonContent.toByteArray())
+                artifactContentCache["${sessionId.value}:${slot.name.value}"] = jsonContent
+            }
+
             val sourceId = toolCall.id ?: invocationId.value
             val assistantEntry = ContextEntry(
                 id = ContextEntryId(UUID.randomUUID().toString()),
@@ -477,28 +506,14 @@ abstract class SessionOrchestrator(
         )
     }
 
-    private suspend fun storeFailedProcessResult(
+    private suspend fun emitProcessResultEvents(
         sessionId: SessionId,
         stageId: StageId,
         stageConfig: StageConfig,
-        toolCalls: List<ToolCallRequest>,
-        fatalEntry: ContextEntry,
     ) {
+        // Emit artifact lifecycle events for process_result slots on failure branches.
+        // Content was already stored in CAS + cache by dispatchToolCalls for every outcome.
         stageConfig.produces.filter { it.kind.id == "process_result" }.forEach { slot ->
-            val cmd = toolCalls.firstOrNull()?.function?.arguments ?: ""
-            val reason = fatalEntry.content.removePrefix("FATAL: ")
-            val processResult = ProcessResultArtifact(
-                status = "failed",
-                command = cmd,
-                exitCode = -1,
-                stdout = "",
-                stderr = reason,
-                durationMs = 0,
-            )
-            val jsonContent = Json.encodeToString(ProcessResultArtifact.serializer(), processResult)
-            artifactStore.put(jsonContent.toByteArray())
-            val cacheKey = "${sessionId.value}:${slot.name.value}"
-            artifactContentCache[cacheKey] = jsonContent
             emit(sessionId, ArtifactCreatedEvent(slot.name, sessionId, stageId, schemaVersion = 1))
             emit(sessionId, ArtifactValidatingEvent(slot.name, sessionId, stageId))
             emit(sessionId, ArtifactValidatedEvent(slot.name, sessionId, stageId))