WL-0MP14WFW6001VE3G: Add priority normalization to create, update and doctor commands

[SorraTheOrc]

Summary

Add priority normalization and validation across wl create, wl update, and wl doctor commands. This ensures consistent priority values in the database by normalizing case and providing a mapping for P* legacy values.

Work Done

1. Created src/validators/priority.ts — a centralized priority validation/normalization utility with:

   • normalizePriority(raw) — case-normalizes canonical values, maps P0-P3 to canonical, returns null for unknown tokens
   • isValidPriority(raw) — checks if a value is a canonical priority (case-insensitive)
   • isMappablePriority(raw) — checks if a value is P0-P3 (case-insensitive)
   • Constants: CANONICAL_PRIORITIES and PRIORITY_MAP

2. Updated wl create — validates the --priority flag: normalizes case, rejects P* and unknown tokens with a clear error message

3. Updated wl update — validates the --priority flag with the same behavior as create

4. Updated wl doctor:

   • New doctor priority subcommand with --dry-run (preview) and --apply (fix P* values)
   • Priority validation integrated into main doctor findings (reported with other findings)
   • doctor --fix applies the P*→canonical mapping for invalid priorities automatically

5. Tests:

   • 14 unit tests covering src/validators/priority.ts
   • 6 integration tests covering doctor priority subcommand

How to Test

• wl create -t "test" -p High — should work (normalizes to "high")
• wl create -t "test" -p P1 — should fail with error about P* not accepted at creation
• wl create -t "test" -p invalid — should fail with error
• wl doctor priority --dry-run — preview invalid priorities
• wl doctor priority --apply — fix P* values in the database

Review Focus

• The validator logic in src/validators/priority.ts
• Error messages in create.ts and update.ts for invalid priorities
• The doctor priority subcommand and its JSON output format
• Integration with the main doctor --fix flow