Add podcast episode 002: Taking Over Battlesnake

[byte-the-bot]

Summary

• Adds episode 002 of coreyja.fm: "Taking Over Battlesnake (and Rewriting It in Rust)"
• Covers quick Mull/Grove project updates, Battlesnake history, the RFC process, Arena Rust rewrite, and future plans (tournaments, solo challenges)
• Publication date: 2026-03-23

TODOs before merge

These frontmatter fields need real values once media is processed:

• youtube_id — currently "TODO", needs the YouTube video ID after upload
• audio_length_bytes — currently 1, needs actual file size
• audio_duration — currently "00:20:27" (estimated from transcript timing), confirm after editing

The audio_url follows the established 002/audio.mp3 pattern and should be correct once uploaded to S3.

Test plan

• cargo test --workspace passes with the new episode file
• Frontmatter parses correctly
• Episode appears in podcast listing sorted by date

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