Fixup github-action-indexer example (#49)

Fix configuration and type issues in github-action-indexer example

This PR addresses three small but important issues in the github-action-indexer example:

* Add missing AUGMENT_API_URL environment variable to the GitHub Actions workflow, ensuring the indexer can connect to the correct API endpoint
* Fix incorrect property reference from this.config.apiKey to this.config.apiToken in the incremental update logic
* Remove readonly modifier from context property to allow reassignment when importing previous state during incremental updates
These fixes ensure the example works correctly for both full and incremental indexing scenarios.

Author: richhankins

examples/typescript-sdk/context/github-action-indexer/.github/workflows/index.yml

@@ -52,6 +52,7 @@ jobs:
         run: npm run index
         env:
           AUGMENT_API_TOKEN: ${{ secrets.AUGMENT_API_TOKEN }}
+          AUGMENT_API_URL: ${{ secrets.AUGMENT_API_URL }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           STORAGE_TYPE: file
           # Branch-specific state path (automatically determined from GITHUB_REF)

examples/typescript-sdk/context/github-action-indexer/src/index-manager.ts

@@ -18,7 +18,7 @@ const DEFAULT_MAX_FILES = 500;
 
 export class IndexManager {
   private readonly github: GitHubClient;
-  private readonly context: DirectContext;
+  private context: DirectContext;
   private readonly config: IndexConfig;
   private readonly statePath: string;
 
@@ -373,7 +373,7 @@ export class IndexManager {
     try {
       // Create a new context from the previous state
       this.context = await DirectContext.importFromFile(tempStateFile, {
-        apiKey: this.config.apiKey,
+        apiKey: this.config.apiToken,
         apiUrl: this.config.apiUrl,
       });
     } finally {