docs(miner): clarify /retry needs X-Lium-Api-Key and 5090 pin

Author: echobt

docs/miner/troubleshooting.md

@@ -16,6 +16,9 @@ Fast diagnosis for the public joinbase path. Prefer Prism OpenAPI error bodies w
 | **404** on `/v1/weights/latest` | No sealed epoch yet | Normal early/quiet network; shares apply on next seal |
 | Static reject / `rejected` | AST sandbox, single-module idiom, similarity, ladder | Fix two-script contract; start from `examples/tiny-1m` |
 | Score ~0 / fail | Step-0 anomaly, memorization gap, missing data contract | No pretrained weights; read only `ctx.data_dir`; write only `ctx.artifacts_dir` |
+| **409 `not_failed`** on `/retry` | Row is not `failed` | `/retry` only recovers **failed** rows. Re-POSTing the identical ZIP is `already-queued` (no new GPU). After infra failure: `POST .../retry` with **`X-Lium-Api-Key`** (hotkey/Bearer alone is not enough) |
+| **400 `missing_lium_api_key`** on `/retry` | Need another GPU rent | Pass `X-Lium-Api-Key` on live |
+| Non-5090 / slow tok/s vs peers | Marketplace drew another SKU | Prism hard-pins **1× RTX 5090**; non-5090 is rejected at rent (no silent score normalize) |
 
 ## 401 Unauthorized / 403 Forbidden