itdove/lore#87: DocRepoIngester: avoid double file read in process_file

[itdove]

Description

#87: DocRepoIngester: avoid double file read in process_file

Related issue (if applicable)

Type of change

• Bug fix
• New feature
• Security fix or detection change
• Documentation or workflow change
• Refactoring or maintenance

Security impact

Select exactly one of the following mutually exclusive options:

• This change has no security impact.
• This change affects security behavior; describe the threat, protection, and user-visible behavior below.

Testing

• Tests added or updated where needed.
• Related tests pass locally.
• Manual verification completed, if applicable.

Commands run

# Record command evidence here

Checklist

• The change is limited to this PR's purpose.
• Documentation is updated where needed.
• CHANGELOG.md is updated for notable changes, or no update is needed.
• Backward compatibility was considered for the public SDK and configuration.
• New dependencies have compatible licenses, if applicable.
• UX contract tests are included when user-visible security behavior changes.