⚡ Bolt: [performance improvement] Replace array lookups with bitwise calculations

[shuwang1]

💡 What: Replaced local 2D lookup arrays (octList, hexList) with direct bitwise mathematical calculations in the oct2bin and hex2bin helper functions.

🎯 Why: Swift allocates local 2D array literals onto the heap every time the function is called. In tightly looped operations like GNSS code generation, this repeated allocation and deallocation is a significant performance bottleneck.

📊 Impact: Reduces memory allocations to zero on these hot paths, significantly decreasing the overhead and CPU cycles required for LFSR bit conversion parsing.

🔬 Measurement: Expected measurable decrease in execution time when generating large code arrays from octal/hex configurations. Verify via CI test suites or local benchmarking.

---

PR created automatically by Jules for task 10961601187897586145 started by @shuwang1

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.