Add FOCUS 1.2 support

[flanakin]

🛠️ Description

• Ingest FOCUS 1.2 cost data
• Add new x_SourceColumns (name TBD) column for original values that were changed by hubs
• Convert FOCUS 1.0 to 1.2 during ingestion
• Remove 1.0 update policies
• Add *_v1_2 Hub functions
• Update *_v1_0 Hub functions to transform 1.2 data back to 1.0
• Update non-versioned Hub functions to use the latest version
• Update data model doc
• Update data processing doc (if needed)
• Fix CD eligibility columns in Prices
• Update Recommendations schema based on latest thinking
• Add placeholder property for anything not covered during ingestion (e.g., x_SourceColumns)

Fixes #1275

📋 Checklist

🔬 How did you test this change?

• 🤏 Lint tests
• 🤞 PS -WhatIf / az validate
• 👍 Manually deployed + verified
• 💪 Unit tests
• 🙌 Integration tests

🙋‍♀️ Do any of the following that apply?

• 🚨 This is a breaking change.
• 🤏 The change is less than 20 lines of code.

📑 Did you update docs/changelog.md?

• ✅ Updated changelog (required for dev PRs)
• ➡️ Will add log in a future PR (feature branch PRs only)
• ❎ Log not needed (small/internal change)

📖 Did you update documentation?

• ✅ Public docs in docs (required for dev)
• ✅ Internal dev docs in src (required for dev)
• ➡️ Will add docs in a future PR (feature branch PRs only)
• ❎ Docs not needed (small/internal change)