move tokens to config

PATCH_README_EVENTSOURCE_SHOP_STATUS_FIX.md

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+# RetrieX EventSource + Shop Status Fix
+
+Patch-only package.
+
+## Purpose
+
+This patch extends the previous stream robustness fix and addresses two issues:
+
+1. The chat now shows a visible reason when the Shopware shop/search API is unreachable or returns a system error.
+2. Reference-probe failures no longer block the actual primary Shopware search request.
+
+## Files
+
+- `public/assets/js/base.js`
+  - Uses native `EventSource` instead of a manually parsed `fetch().body.getReader()` stream.
+  - Starts a short-lived stream job with `POST /ask-jobs`, then opens `GET /ask-sse/{jobId}`.
+
+- `src/Controller/AskSseController.php`
+  - Adds `POST /ask-jobs`.
+  - Adds `GET /ask-sse/{jobId}` for native EventSource streaming.
+  - Keeps the old `POST /ask-sse` endpoint as backwards compatibility.
+  - Stores short-lived stream jobs under `var/stream_jobs`.
+
+- `src/Commerce/ShopSearchService.php`
+  - Reference-probe Store API failures are logged but no longer stop the primary search.
+  - The failure state is reset after a failed reference probe before the primary search starts.
+  - Retry without commerce history is skipped only after a real primary Store API system failure.
+
+- `src/Agent/AgentRunner.php`
+  - If the primary shop search has a Store API system failure, the chat displays:
+    `Shopsystem aktuell nicht erreichbar oder fehlerhaft. Grund: ...`
+  - Repair search is skipped after primary Store API system failures.
+
+## After installation
+
+Run:
+
+```bash
+bin/console cache:clear
+```
+
+If OPcache/PHP-FPM is active, reload PHP-FPM afterwards.