Replace magic number with named constant in format_time bounds check

[Copilot]

Addresses code review feedback on PR #29 regarding unclear magic number 15 in bounds checking logic.

Changes:

• Replaced magic number 15 with MAX_REPLACEMENT_LENGTH = 10 constant in format_time()
• Added inline comment documenting that "hh:mm:ss a" is the longest replacement (10 chars)
• Updated bounds check to BUFFER_LENGTH - MAX_REPLACEMENT_LENGTH - 1 for clarity

// Before
while (time[i] != '\0' && pos < BUFFER_LENGTH - 15) {

// After  
const int MAX_REPLACEMENT_LENGTH = 10; // "hh:mm:ss a" is the longest
while (time[i] != '\0' && pos < BUFFER_LENGTH - MAX_REPLACEMENT_LENGTH - 1) {

The new constant is less conservative (11 vs 15) but correctly sized for the actual longest replacement string.

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[Copilot]

Pull request overview

This PR addresses code review feedback by replacing a magic number with a named constant to improve code clarity in the format_time() function's bounds checking logic.

• Introduced MAX_REPLACEMENT_LENGTH constant to replace the magic number 15
• Added documentation explaining that "hh:mm:ss a" is the longest replacement string
• Updated the bounds check calculation to use the new constant

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
linux/system_date_time_format_plugin.cc	Replaced magic number 15 with MAX_REPLACEMENT_LENGTH = 10 constant and updated bounds check logic
_codeql_detected_source_root	Added CodeQL configuration file (metadata change)

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