Allow users to manually add missing field labels when OCR fails to detect them

[jillcfoley1]

As a document reviewer, I want to add a new field label and its corresponding value if the OCR tool (e.g., Textract) fails to capture it, so that I can ensure the final structured data (CSV/JSON) includes all necessary fields.

Acceptance Criteria:

1. There is a way to manually add a field label:

• If a field is missing from the extracted data, the user can click a button (e.g., “+ Add Field”).
• The user can input a field label (e.g., “2. City”) and its corresponding value (e.g., “Ipswich”).
• The newly added field will be included in the final structured output.

2. Error logging & analytics:

• The system logs instances where users manually add missing fields to track OCR failures.
• Devs can export error logs to refine OCR tuning and improve accuracy.

3. The manually added fields should seamlessly integrate into the structured data format (CSV/JSON).