[serabi]

Change description

The goal of this PR is to add time-of-day conditions to the 21 grass encounters on Kanto Route 13 in Crystal. Right now none of them have a condition, so the morning, day and night tables all show up at once. For example, Chansey's three 1% slots add up to 3%, and Noctowl and Venonat show up during the day.

This adds time-morning to encounters 55979-55985, time-day to 55986-55992 and time-night to 55993-55999.

Closes #1140.

References

• Crystal's disassembly has separate morning, day and night grass tables for Route 13:
  https://github.com/pret/pokecrystal/blob/3c813b0b4d82b39bf62185aceffb76fd6026c70b/data/wild/kanto_grass.asm#L481-L507
• Encounters 55979-55999 are those three tables, in the same order:
  https://github.com/PokeAPI/pokeapi/blob/8a92bfa7dab2f12b84b5d151562f9857c133ff30/data/v2/csv/encounters.csv#L52165-L52185
• The condition map skips from 55978 to 56000:
  https://github.com/PokeAPI/pokeapi/blob/8a92bfa7dab2f12b84b5d151562f9857c133ff30/data/v2/csv/encounter_condition_value_map.csv#L15640-L15641

Testing

Built the local database before and after the change and checked the Route 13 location-area endpoint.

Crystal's grass encounters now total 100% in the morning, day and night.

All 69 tests passed, along with pre-commit, lint, formatting and type checks.

AI coding assistance disclosure

I used AI assistance from Claude Code (Claude Opus 5.5) to investigate the issue, compare PokeAPI's CSV records with Crystal's disassembled encounter table, and apply the fix. I then reviewed all of the code manually. All decisions made - and the PR text - are my own.

Contributor check list

• I have written a description of the contribution and explained its motivation.
• I have written tests for my code changes (if applicable).
• I have read and understood the AI Assisted Contribution guidelines.
• I will own this change in production, and I am prepared to fix any bugs caused by my code change.