feat: implement MixtapeLabs workflow graph with audio analysis pipeline

Author: Thavarshan

src/graph/auralyze-graph.ts src/graph/mixtapelabs-graph.tssrc/graph/auralyze-graph.ts renamed to src/graph/mixtapelabs-graph.ts

@@ -1,5 +1,5 @@
 /**
- * Mixtapelabs Workflow Graph - LangGraph Orchestration
+ * MixtapeLabs Workflow Graph - LangGraph Orchestration
  *
  * Implements the complete audio analysis pipeline as a LangGraph state machine.
  * The workflow is linear and fault-tolerant:
@@ -20,7 +20,7 @@
  */
 import { Annotation, END, START, StateGraph } from '@langchain/langgraph';
 import type { EngineState } from '../state.ts';
-import type { MixtapelabsEngineDeps } from '../types.ts';
+import type { MixtapeLabsEngineDeps } from '../types.ts';
 
 /**
  * LangGraph annotation defining the shape of our workflow state.
@@ -82,7 +82,7 @@ const GRAPH_NODE_NAMES = [
  */
 export async function validateInputNode(state: GraphState): Promise<GraphNodeResult> {
   if (!state.uploadUrl) {
-    return { error: 'uploadUrl is required to run an Mixtapelabs session' };
+    return { error: 'uploadUrl is required to run an MixtapeLabs session' };
   }
 
   return {};
@@ -103,7 +103,7 @@ export async function validateInputNode(state: GraphState): Promise<GraphNodeRes
  * @returns { fileInfo } on success, { error } on failure, or {} if skipped
  */
 export async function metadataStepNode(
-  deps: Pick<MixtapelabsEngineDeps, 'audioMetadataClient'>,
+  deps: Pick<MixtapeLabsEngineDeps, 'audioMetadataClient'>,
   state: GraphState,
 ): Promise<GraphNodeResult> {
   // Skip if no URL or already errored
@@ -137,7 +137,7 @@ export async function metadataStepNode(
  * @returns { analysis } on success, { error } on failure, or {} if skipped
  */
 export async function analysisStepNode(
-  deps: Pick<MixtapelabsEngineDeps, 'audioAnalysisClient'>,
+  deps: Pick<MixtapeLabsEngineDeps, 'audioAnalysisClient'>,
   state: GraphState,
 ): Promise<GraphNodeResult> {
   // Skip if no URL or already errored
@@ -173,7 +173,7 @@ export async function analysisStepNode(
  * @returns { feedbackText, suggestions } on success, { error } on failure, or {} if skipped
  */
 export async function feedbackStepNode(
-  deps: Pick<MixtapelabsEngineDeps, 'feedbackClient'>,
+  deps: Pick<MixtapeLabsEngineDeps, 'feedbackClient'>,
   state: GraphState,
 ): Promise<GraphNodeResult> {
   // Skip if already errored
@@ -193,7 +193,7 @@ export async function feedbackStepNode(
 }
 
 /**
- * Constructs and compiles the complete Mixtapelabs workflow graph.
+ * Constructs and compiles the complete MixtapeLabs workflow graph.
  *
  * This function:
  * 1. Creates a LangGraph StateGraph with our annotation
@@ -225,7 +225,7 @@ export async function feedbackStepNode(
  * @param deps - Complete set of injected service clients
  * @returns Compiled graph ready for execution via `.invoke(initialState)`
  */
-export function buildMixtapelabsGraph(deps: MixtapelabsEngineDeps) {
+export function buildMixtapeLabsGraph(deps: MixtapeLabsEngineDeps) {
   const workflow = new StateGraph(GraphAnnotation, {
     nodes: GRAPH_NODE_NAMES,
   }) as StateGraph<typeof GraphAnnotation, GraphState, GraphNodeResult, GraphNodeName>;