Maintain src/constants.rs

[chrsoo]

Priority: Medium
Labels: technical-debt, area:core, priority:medium, maintenance

Description:
Constants file needs ongoing maintenance to stay in sync with INDIGO.

Source: Item #58 from consolidated analysis
Files: src/constants.rs

Acceptance Criteria:

• Constants up to date with INDIGO
• Automated update process
• Tests validate constants
• Documentation on update process

Related Issues: AUTOMATION-001 (Constant updates)