fix: format models.py with Black, add ensureDefaultProfile to E2E tests

[namtroi]

User description

• Reformat ai-worker/src/models.py with Black
• Add ensureDefaultProfile() call to all E2E tests to fix upload failures

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PR Type

Bug fix, Tests

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Description

• Add ensureDefaultProfile() call to E2E test setup

  • Fixes upload failures in error-handling, pdf-upload-flow, and query-flow tests

• Reformat models.py with Black code formatter

  • Fixes whitespace and line length issues in ProfileConfig class

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Diagram Walkthrough

flowchart LR
  A["E2E Tests<br/>error-handling<br/>pdf-upload-flow<br/>query-flow"] -- "import ensureDefaultProfile" --> B["database.js helpers"]
  A -- "call in beforeEach" --> C["ensureDefaultProfile()"]
  C -- "ensures" --> D["Default Profile Setup"]
  E["models.py<br/>ProfileConfig"] -- "Black formatting" --> F["Code Style<br/>Compliance"]

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File Walkthrough

	Relevant files
Tests	error-handling.test.ts Add ensureDefaultProfile to error-handling tests                  apps/backend/tests/e2e/error-handling.test.ts Import ensureDefaultProfile from database helpers Call ensureDefaultProfile() in beforeEach hook to ensure default profile exists before each test +2/-1      pdf-upload-flow.test.ts Add ensureDefaultProfile to pdf-upload-flow tests                apps/backend/tests/e2e/pdf-upload-flow.test.ts Import ensureDefaultProfile from database helpers Call ensureDefaultProfile() in beforeEach hook to ensure default profile exists before each test +2/-1      query-flow.test.ts Add ensureDefaultProfile to query-flow tests                          apps/backend/tests/e2e/query-flow.test.ts Import ensureDefaultProfile from database helpers Call ensureDefaultProfile() in beforeEach hook to ensure default profile exists before each test +2/-1
Formatting	models.py Format ProfileConfig class with Black                                        apps/ai-worker/src/models.py Remove trailing whitespace from docstring and class fields Reformat ocr_languages_list property to comply with Black line length limits Normalize blank lines between class sections +8/-6

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[qodo-code-review]

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