fix(utils): preserve author names containing commas in git log parsing

[Dharya-dev]

Motivation

getGitRepositoryFilesInfo() in gitUtils.ts parses git log output formatted as t:<timestamp>,a:<author name>. The current implementation uses logLine.split(',') to separate the timestamp from the author name.

This breaks when the author's Git user.name contains a comma — for example, Doe, Jane or Smith, Jr.. The split produces three array elements instead of two:

Input:  "t:1716666666,a:Doe, Jane"
Split:  ["t:1716666666", "a:Doe", " Jane"]
Result: author = "Doe"  ← truncated!

The getFileCommitDate() function in the same file avoids this by using a regex with a greedy (?<author>.+) capture group, but the newer getGitRepositoryFilesInfo() function (introduced in the eager VCS strategy) doesn't share that approach.

Fix

Replaced split(',') with indexOf(',a:') to locate the known separator between the timestamp and author fields. This safely handles commas anywhere in the author name:

// Before:
const [timestampStr, authorStr] = logLine.split(',') as [string, string];
const timestamp = Number.parseInt(timestampStr.slice(2), 10) * 1000;
const author = authorStr.slice(2);

// After:
const separatorIndex = logLine.indexOf(',a:');
const timestampStr = logLine.slice(2, separatorIndex);
const author = logLine.slice(separatorIndex + 3);

Test plan

Added a regression test in gitUtils.test.ts that commits a file with an author name containing a comma (Doe, Jane) and verifies that getGitRepositoryFilesInfo() preserves the full name.

Checklist

• I have read the contributing guidelines

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