fix(test,project): replace crashes with VALIDATION_ERROR on --since overflow and --password-file ENOENT

[crypticsaiyan]

Summary

Two edge cases involving invalid user input previously caused unhandled exceptions (raw Node stack traces and exit code 1) instead of standard typed validation errors (exit code 5).

• Bug 1: Providing an extremely large value to --since (e.g., 99999999999h) caused a RangeError: Invalid time value because it exceeded the valid JavaScript date range during .toISOString() conversion.
• Bug 2: Providing a non-existent file path to --password-file during project creation or updates caused a raw ENOENT crash due to an unguarded readFileSync call.

The Fix

• Date Overflow Guard: Added a Number.isFinite(result.getTime()) check in parseDuration (src/commands/test.ts) to intercept invalid dates and throw a localValidationError before attempting conversion.
• Safe File Reading: Wrapped readFileSync calls for the password file in try/catch blocks (src/commands/project.ts) to gracefully capture read errors and emit typed validation errors.

Testing & Validation

Regression Tests Added:

• Overflow Handling: 2 tests added to src/commands/test.result.history.spec.ts verifying that extreme --since values now trigger graceful validation errors instead of crashing.
• File Read Handling: 2 tests added to src/commands/project.test.ts ensuring missing password files are caught during both create and update operations.

CI Gates: All local checks pass.

• Lint & format check
• TypeScript compiler (typecheck)
• Unit tests
• Coverage (≥80% threshold met)

Files Changed:

• src/commands/test.ts
• src/commands/project.ts
• src/commands/test.result.history.spec.ts
• src/commands/project.test.ts