resolve review issues

docs/contributions-architecture.md

@@ -147,6 +147,7 @@ lib/
 **Existing Fields Used:**
 - `joined_at` - For calculating contribution start
 - `left_at` - For limiting period generation
+- These fields must remain member fields and should not be replaced by custom fields in the future
 
 ### Settings Integration
 
@@ -236,6 +237,7 @@ lib/
 
 **Bulk Operations:**
 - `bulk_mark_as_paid` - Mark multiple periods as paid (efficiency)
+  - low priority, can be a future issue
 
 ### Contribution Type Change Handling
 
@@ -403,7 +405,7 @@ lib/
 
 **AC-UI-MD-1:** Contributions section shows all periods  
 **AC-UI-MD-2:** Table columns: Period, Interval, Amount, Status, Actions  
-**AC-UI-MD-3:** Checkbox per period for bulk marking  
+**AC-UI-MD-3:** Checkbox per period for bulk marking (low prio)  
 **AC-UI-MD-4:** "Mark selected as paid" button  
 **AC-UI-MD-5:** Dropdown to change contribution type (same interval only)  
 **AC-UI-MD-6:** Warning if different interval selected  
@@ -466,7 +468,7 @@ lib/
 
 **Status Management Flow:**
 - Mark single period as paid
-- Bulk mark multiple periods
+- Bulk mark multiple periods (low prio)
 - Status transitions work
 - Permissions enforced
 
@@ -487,7 +489,7 @@ lib/
 **Member Detail:**
 - Periods table displays all periods
 - Checkboxes work
-- Bulk marking works
+- Bulk marking works (low prio)
 - Type change validation works
 - Actions only shown with permission