[Sprint V04.1.0] feat: Add wiki status updates to sprint-close workflow

- Add step 5: Update wiki implementation page status (Implemented/Partial/Failed)
- Add step 6: Update wiki proposal page when all implementations complete
- Add update_wiki_page to MCP tools in both sprint-close.md and orchestrator.md
- Add critical reminders for wiki status updates

Implements Phase 2 of V04.1.0 Wiki-Based Planning Enhancement.
Closes #162

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/projman/agents/orchestrator.md

@@ -383,7 +383,58 @@ create_lesson(
 )
 ```
 
-**E. Git Operations**
+**E. Update Wiki Implementation Page**
+
+Fetch and update the implementation page status:
+```
+get_wiki_page(page_name="Change-V4.1.0:-Proposal-(Implementation-1)")
+```
+
+Update with completion status:
+```
+update_wiki_page(
+    page_name="Change-V4.1.0:-Proposal-(Implementation-1)",
+    content="""
+> **Type:** Change Proposal Implementation
+> **Version:** V04.1.0
+> **Status:** Implemented ✅
+> **Date:** 2026-01-26
+> **Completed:** 2026-01-28
+> **Origin:** [Proposal](wiki-link)
+> **Sprint:** Sprint 17
+
+# Implementation Details
+[Original content...]
+
+## Completion Summary
+- All planned issues completed
+- Lessons learned: [Link to lesson]
+"""
+)
+```
+
+**F. Update Wiki Proposal Page**
+
+If all implementations complete, update proposal status:
+```
+update_wiki_page(
+    page_name="Change-V4.1.0:-Proposal",
+    content="""
+> **Type:** Change Proposal
+> **Version:** V04.1.0
+> **Status:** Implemented ✅
+> **Date:** 2026-01-26
+
+# Feature Title
+[Original content...]
+
+## Implementations
+- [Implementation 1](link) - ✅ Completed (Sprint 17)
+"""
+)
+```
+
+**G. Git Operations**
 
 Offer to handle git cleanup:
 ```
@@ -418,7 +469,9 @@ Would you like me to handle git operations?
 **Lessons Learned Tools (Gitea Wiki):**
 - `search_lessons(query, tags, limit)` - Find relevant past lessons
 - `create_lesson(title, content, tags, category)` - Save new lesson
-- `get_wiki_page(page_name)` - Fetch specific pages
+- `get_wiki_page(page_name)` - Fetch implementation/proposal pages
+- `update_wiki_page(page_name, content)` - Update implementation/proposal status
+- `list_wiki_pages()` - List all wiki pages
 
 **Validation Tools:**
 - `get_branch_protection(branch)` - Check merge rules
@@ -455,6 +508,8 @@ Would you like me to handle git operations?
 8. **Auto-check subtasks** - Mark issue subtasks complete on close
 9. **Track meticulously** - Update issues immediately, document blockers
 10. **Capture lessons** - At sprint close, interview thoroughly
+11. **Update wiki status** - At sprint close, update implementation and proposal pages
+12. **Link lessons to wiki** - Include lesson links in implementation completion summary
 
 ## Your Mission