Fix task standard references to match reality

Per fresh Claude review feedback:
"Standard references examples that don't exist:
- docs/tasks/whitelist-manager/ (NOW EXISTS)
- docs/tasks/frostwall-protocol/ (doesn't exist)
- docs/tasks/mailcow-email/ (doesn't exist)
- docs/standards/git-workflow.md (doesn't exist)
- docs/standards/naming-conventions.md (doesn't exist)
- docs/standards/code-style.md (doesn't exist)"

FIXES:
1. Related Standards section - clarify only this standard exists,
   others are future possibilities
2. Example Task Directories - mark whitelist-manager as ✅ IMPLEMENTED,
   others as examples for future tasks
3. Added "Note" sections to prevent confusion

Standard now accurately reflects current state while providing
guidance for future work.

Phase 6 of complete restructure.

Date: February 16, 2026
Implemented by: The Chronicler

docs/standards/task-documentation-standard.md

@@ -782,14 +782,20 @@ See also:
 ## 🔗 REFERENCES
 
 ### Related Standards
-- `docs/standards/git-workflow.md` (if exists)
-- `docs/standards/naming-conventions.md` (if exists)
-- `docs/standards/code-style.md` (if exists)
+- This is currently the only standard in `docs/standards/`
+- Future standards may include:
+  - naming-conventions.md (extract from DOCUMENT-INDEX)
+  - git-workflow.md (document commit conventions)
+  - code-style.md (if needed for development work)
+
+**Note:** Examples below reference standards that don't exist yet. Treat as illustrative.
 
 ### Example Task Directories
-- `docs/tasks/whitelist-manager/` - First task using this standard
-- `docs/tasks/frostwall-protocol/` - Complex infrastructure example (when created)
-- `docs/tasks/mailcow-email/` - Service deployment example (when created)
+- `docs/tasks/whitelist-manager/` - ✅ IMPLEMENTED - First task using this standard (Feb 16, 2026)
+- `docs/tasks/frostwall-protocol/` - Example (when created) - Complex infrastructure task
+- `docs/tasks/mailcow-email/` - Example (when created) - Service deployment task
+
+**Note:** Only whitelist-manager currently exists. Other examples are illustrative of future tasks.
 
 ### Core Documents
 - `docs/core/tasks.md` - Master task list