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/user/profile/Update Theme.yml

@@ -8,29 +8,5 @@ http:
   auth: inherit
   body:
     type: json
-    jsonBody: |-
-      {
-        "theme": "dracula"
-      }
-
-docs: |-
-  ## Update Theme
-    
-    Fast theme switching for the application UI.
-    
-    **Method:** PUT
-    
-    **Endpoint:** /api/auth/theme
-    
-    **Authentication:** Required (Bearer token)
-    
-    **Request Body:**
-    - `theme` (string, required): Theme name
-    
-    **Response:**
-    - `message` (string): Success message
-    
-    **Status Codes:**
-    - 200: Success
-    - 400: Invalid theme
-    - 401: Unauthorized
+    data: "{\n  \"theme\": \"dracula\"\n}"
+docs: "## Update Theme\n  \n  Fast theme switching for the application UI.\n  \n  **Method:** PUT\n  \n  **Endpoint:** /api/auth/theme\n  \n  **Authentication:** Required (Bearer token)\n  \n  **Request Body:**\n  - `theme` (string, required): Theme name\n  \n  **Response:**\n  - `message` (string): Success message\n  \n  **Status Codes:**\n  - 200: Success\n  - 400: Invalid theme\n  - 401: Unauthorized"