fix(bruno): convert drifted body keys to body.data — CLI scenario runs now carry bodies

Follow-up to the sweep route audit, correcting its diagnosis: the CLI
DOES read .yml bodies — via OpenCollection's `body.data` string form
(the NewDevDBSetup script always worked because it used it). The
failing scenario POSTs used `body.json` (structured) / `body.jsonBody`
(string) — keys the CLI silently ignores, sending Content-Length: 0
with form-urlencoded content-type, so every server bind failed.

- 81 bodies converted to data-form (json maps serialized; jsonBody
  strings kept verbatim, {{vars}} intact).
- 6 pre-existing TRUNCATED payloads repaired: the original generator
  cut bodies at the first {{var}} (every SHA-256-identified scenario
  plus Sync Progress/Sync Bookmarks shipped mid-JSON and 400'd from
  day one). Rewritten whole, faithful to each file's documented
  purpose; book_sha256/book_uuid added to the environment.
- environments: opds_base_url correction from the sweep retained.

Verified live against the rebuilt dev container: the full koreader
scenario tree runs green through `bru run` — 14/14 (202s across
immediate/checkpoint/SHA-256 progress, 200s bookmarks, highlights,
notes; SHA-256 book identification exercised against a real
file_sha256).

bruno/devices/koreader/scenarios/Sync Notes.yml

@@ -3,8 +3,8 @@ docs: "## Sync KOReader Notes\n\nSynchronizes user notes separately from highlig
   \ via \"Add note\" option\n- Edited in note editor\n- Shown in \"Notes\" panel\n- Can be organized by chapter\n- Export functionality available\n- Search support\n\n**Advanced Features:**\n- **Markdown**: Bold, italic, lists (some versions)\n- **Tags**: User-defined tags (via plugins)\n- **Links**: Internal/external links\n- **Formatting**: Rich text in newer versions\n\n**Use Cases:**\n- Study notes\n- Personal reflections\n- Academic annotations\n- Research insights\n- Book club discussion prep\n- Knowledge management"
 http:
   body:
-    jsonBody: "{\n  \"book_uuid\": \"{{media_item_id}}\",\n  \"notes\": [\n    {\n      \"datetime\": \"2026-01-30T19:52:00Z\",\n      \"notes\": \"A personal note about this chapter\",\n      \"chapter\": 4,\n      \"page\": 57,\n      \"pos0\": \"3\"\n    }\n  ]\n}"
     type: json
+    data: "{\n  \"book_uuid\": \"{{media_item_id}}\",\n  \"notes\": [\n    {\n      \"datetime\": \"2026-01-30T19:52:00Z\",\n      \"notes\": \"A personal note about this chapter\",\n      \"chapter\": 4,\n      \"page\": 57,\n      \"pos0\": \"3\"\n    }\n  ]\n}"
   headers:
   - key: Content-Type
     value: application/json