Audit trail

[Cubix33]

Closes #297

Added functionality to separately store a .txt file in inputs/ containing :

1. Field name
2. Value extracted for that field from transcript
3. Line snippet from transcript from where the value was extracted

Example:

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FIREFORM AI DATA EXTRACTION AUDIT TRAIL
Generated: 2026-03-19 19:29:35
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FIELD : Employee's name
VALUE : John Doe
SOURCE: "The employee's name is John Doe."
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FIELD : Employee's job title
VALUE : managing director
SOURCE: "His job title is managing director."
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FIELD : Employee's department supervisor
VALUE : Jane Doe
SOURCE: "His department supervisor is Jane Doe."
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FIELD : Employee's phone number
VALUE : 123456
SOURCE: "His phone number is 123456."
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FIELD : Employee's email
VALUE : jdoe@ucsc.edu
SOURCE: "His email is jdoe@ucsc.edu."
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FIELD : Signature
VALUE : Mamañema
SOURCE: "<Mamañema>, and the date is 01/02/2005"
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FIELD : Date
VALUE : 01/02/2005
SOURCE: "The exact sentence that justifies the value is: 'The date is 01/02/2005'"
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