update: Fuel filter ordered - Pentius brand (~)

- Added purchase status to progress.md
- Documented no-name brand purchase with quality risk note
- Updated revision history with purchase date

FuelPressureIssue/progress.md

@@ -51,7 +51,9 @@
 - **OEM GM Part #**: `88915445`
 - **Aftermarket equivalents**: ACDelco PF-1236, WIX 33138, Fram PH3600
 - **Cost**: ~$8-20
-- **Availability:** Auto parts stores, online (Amazon, eBay, RockAuto)
+- **Availability**: Auto parts stores, online (Amazon, eBay, RockAuto)
+- **Purchase Status:** ✅ **ORDERED** - Pentius Filter (eBay, ~$8 total)
+  - *Note: Bought no-name brand for cost savings; risk of poor quality*
 
 **Tools needed:**
 - 13mm socket
@@ -157,6 +159,7 @@
 | 2026-03-21 | Initial diagnosis complete - weak fuel pump confirmed |
 | 2026-03-21 | Fuel filter part #88915445 identified |
 | 2026-03-21 | Installation guides and eBay links added |
+| 2026-03-21 | **FUEL FILTER ORDERED** - Pentius Filter, ~$8 (no-name brand) |
 
 ---
 
@@ -166,3 +169,4 @@
 - **Distributor problem was coincidental** — fuel system was already failing
 - **Parts sourcing:** Use local auto parts store with VIN lookup for correct pump and filter
 - **Old fuel filter:** Remove old filter first to confirm it's the correct part before buying new one
+- **Quality concern:** Bought cheapest option (~$8 vs ~$15-20 for premium brands); monitor for leaks or premature failure