feat(plugins): implement Sprint 4 commands (#241-#258)

Sprint 4 - Plugin Commands implementation adding 18 new user-facing
commands across 8 plugins as part of V5.2.0 Plugin Enhancements.

**projman:**
- #241: /sprint-diagram - Mermaid visualization of sprint issues

**pr-review:**
- #242: Confidence threshold config (PR_REVIEW_CONFIDENCE_THRESHOLD)
- #243: /pr-diff - Formatted diff with inline review comments

**data-platform:**
- #244: /data-quality - DataFrame quality checks (nulls, duplicates, outliers)
- #245: /lineage-viz - dbt lineage as Mermaid diagrams
- #246: /dbt-test - Formatted dbt test runner

**viz-platform:**
- #247: /chart-export - Export charts to PNG/SVG/PDF via kaleido
- #248: /accessibility-check - Color blind validation (WCAG contrast)
- #249: /breakpoints - Responsive layout configuration

**contract-validator:**
- #250: /dependency-graph - Plugin dependency visualization

**doc-guardian:**
- #251: /changelog-gen - Generate changelog from conventional commits
- #252: /doc-coverage - Documentation coverage metrics
- #253: /stale-docs - Flag outdated documentation

**claude-config-maintainer:**
- #254: /config-diff - Track CLAUDE.md changes over time
- #255: /config-lint - 31 lint rules for CLAUDE.md best practices

**cmdb-assistant:**
- #256: /cmdb-topology - Infrastructure topology diagrams
- #257: /change-audit - NetBox audit trail queries
- #258: /ip-conflicts - Detect IP conflicts and overlaps

Closes #241, #242, #243, #244, #245, #246, #247, #248, #249,
#250, #251, #252, #253, #254, #255, #256, #257, #258

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

plugins/cmdb-assistant/README.md

@@ -2,6 +2,12 @@
 
 A Claude Code plugin for NetBox CMDB integration - query, create, update, and manage your network infrastructure directly from Claude Code.
 
+## What's New in v1.2.0
+
+- **`/cmdb-topology`**: Generate Mermaid diagrams showing infrastructure topology (rack view, network view, site overview)
+- **`/change-audit`**: Query and analyze NetBox audit log for change tracking and compliance
+- **`/ip-conflicts`**: Detect IP address conflicts and overlapping prefixes
+
 ## What's New in v1.1.0
 
 - **Data Quality Validation**: Hooks for SessionStart and PreToolUse that check data quality and warn about missing fields
@@ -59,6 +65,9 @@ Add to your Claude Code plugins or marketplace configuration.
 | `/cmdb-audit [scope]` | Data quality analysis (all, vms, devices, naming, roles) |
 | `/cmdb-register` | Register current machine into NetBox with running apps |
 | `/cmdb-sync` | Sync machine state with NetBox (detect drift, update) |
+| `/cmdb-topology <view>` | Generate Mermaid diagrams (rack, network, site, full) |
+| `/change-audit [filters]` | Query NetBox audit log for change tracking |
+| `/ip-conflicts [scope]` | Detect IP conflicts and overlapping prefixes |
 
 ## Agent
 
@@ -140,9 +149,12 @@ cmdb-assistant/
 │   ├── cmdb-device.md       # Device management
 │   ├── cmdb-ip.md           # IP management
 │   ├── cmdb-site.md         # Site management
-│   ├── cmdb-audit.md        # Data quality audit (NEW)
-│   ├── cmdb-register.md     # Machine registration (NEW)
-│   └── cmdb-sync.md         # Machine sync (NEW)
+│   ├── cmdb-audit.md        # Data quality audit
+│   ├── cmdb-register.md     # Machine registration
+│   ├── cmdb-sync.md         # Machine sync
+│   ├── cmdb-topology.md     # Topology visualization (NEW)
+│   ├── change-audit.md      # Change audit log (NEW)
+│   └── ip-conflicts.md      # IP conflict detection (NEW)
 ├── hooks/
 │   ├── hooks.json           # Hook configuration
 │   ├── startup-check.sh     # SessionStart validation