Replace infrastructure costs with actual domain invoice data

Start ledger January 2025. Record coulomb.social (3.75 EUR/mo) and
coulomb.pro (3.00 EUR/mo) as per-domain expense rows. Remove Bubble and
placeholder overhead. Add infrastructure reference catalogs; virtual server
records pending invoice data.

projects/coulomb-pricing/observatory/dashboard.py

@@ -119,6 +119,7 @@ _Revenue source: {snapshot.revenue_source}_
 - Product model (`data/product.json`)
 - Budget (`data/budget.json`)
 - Expense records (`data/expense_records.json`) — source of truth for costs
+- Infrastructure catalog (`data/infrastructure/`) — domain and VPS reference data
 - Payment records (`data/payment_records.json`)
 - Membership (`data/membership.json`)
 - Requirements (`REQUIREMENTS.md`)