Fix L1 cache key to include all API-affecting parameters

The L1 cache was missing critical parameters (shafaq, tune, midnightMode,
latitudeAdjustmentMethod, adjustment) that affect prayer time calculations.
This caused users with different settings to receive cached data from other
users, resulting in wrong prayer times.

New L1 key format:
pt:{location}:{method}:{school}:{shafaq}:{tune}:{midnightMode}:{latAdjMethod}:{adjustment}:{yearMonth}

Also added comprehensive test suite (47 tests) covering all cache scenarios.

Author: Ahmed Elywa