feat: Complete MongoDB/MinIO removal and integrate CLI consolidation

This commit completes the MongoDB and MinIO removal from the StellaOps
platform and integrates the CLI consolidation work from remote.

## Infrastructure Changes

- PostgreSQL v16+ is now the ONLY supported database
- Valkey v8.0 replaces Redis for caching, DPoP security, and event streams
- RustFS is the primary object storage (MinIO fully removed)
- NATS is OPTIONAL for messaging (Valkey is default transport)

## Docker Compose Updates

Updated all deployment profiles:
- deploy/compose/docker-compose.dev.yaml
- deploy/compose/docker-compose.airgap.yaml
- deploy/compose/docker-compose.stage.yaml
- deploy/compose/docker-compose.prod.yaml

All profiles now use PostgreSQL + Valkey + RustFS stack.

## Environment Configuration

Updated all env.example files with:
- Removed: MONGO_*, MINIO_* variables
- Added: POSTGRES_*, VALKEY_* variables
- Updated: SCANNER_QUEUE_BROKER to use Valkey by default
- Enhanced: Surface.Env and Offline Kit configurations

## Aoc.Cli Changes

- Removed --mongo option entirely
- Made --postgres option required
- Removed VerifyMongoAsync method
- PostgreSQL is now the only supported backend

## CLI Consolidation (from merge)

Integrated plugin architecture for unified CLI:
- stella aoc verify (replaces stella-aoc)
- stella symbols (replaces stella-symbols)
- Plugin manifests and command modules
- Migration guide for users

## Documentation Updates

- README.md: Updated deployment workflow notes
- DEVELOPER_ONBOARDING.md: Complete Valkey-centric flow diagrams
- QUICKSTART_HYBRID_DEBUG.md: Removed MongoDB/MinIO references
- VERSION_MATRIX.md: Updated infrastructure dependencies
- CLEANUP_SUMMARY.md: Marked all cleanup tasks complete
- 07_HIGH_LEVEL_ARCHITECTURE.md: Corrected infrastructure stack
- 11_DATA_SCHEMAS.md: Valkey keyspace documentation

## Merge Resolution

Resolved merge conflicts by accepting incoming changes which had more
complete Surface.Env and Offline Kit configurations.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

docs/QUICKSTART_HYBRID_DEBUG.md

@@ -28,14 +28,11 @@ notepad .env
 
 **Minimum required changes in .env:**
 ```bash
-MONGO_INITDB_ROOT_USERNAME=stellaops
-MONGO_INITDB_ROOT_PASSWORD=StrongPassword123!
-
 POSTGRES_USER=stellaops
 POSTGRES_PASSWORD=StrongPassword123!
+POSTGRES_DB=stellaops_platform
 
-MINIO_ROOT_USER=stellaops
-MINIO_ROOT_PASSWORD=StrongPassword123!
+VALKEY_PORT=6379
 ```
 
 **Start the platform:**
@@ -96,9 +93,7 @@ cd "C:\dev\New folder\git.stella-ops.org\src\Scanner\StellaOps.Scanner.WebServic
   },
   "Scanner": {
     "Storage": {
-      "Mongo": {
-        "ConnectionString": "mongodb://stellaops:StrongPassword123!@localhost:27017"
-      }
+      "Driver": "postgres"
     },
     "ArtifactStore": {
       "Driver": "rustfs",
@@ -107,7 +102,7 @@ cd "C:\dev\New folder\git.stella-ops.org\src\Scanner\StellaOps.Scanner.WebServic
       "TimeoutSeconds": 30
     },
     "Queue": {
-      "Broker": "nats://localhost:4222"
+      "Broker": "valkey://localhost:6379"
     },
     "Events": {
       "Enabled": false
@@ -304,31 +299,32 @@ docker compose -f docker-compose.dev.yaml logs postgres
 docker compose -f docker-compose.dev.yaml restart postgres
 ```
 
-### Issue 3: "NATS connection refused"
+### Issue 3: "Valkey connection refused"
 
 **Fix:**
 ```powershell
-# Verify NATS is running
-docker compose -f docker-compose.dev.yaml ps nats
+# Verify Valkey is running
+docker compose -f docker-compose.dev.yaml ps valkey
 
-# Restart NATS
-docker compose -f docker-compose.dev.yaml restart nats
+# Restart Valkey
+docker compose -f docker-compose.dev.yaml restart valkey
 
 # Test connectivity
-telnet localhost 4222
+telnet localhost 6379
 ```
 
-### Issue 4: "MongoDB authentication failed"
+### Issue 4: "RustFS connection failed"
 
 **Fix:**
-
-Check that passwords match in `.env` and `appsettings.Development.json`:
-
 ```powershell
-# Reset MongoDB
-docker compose -f docker-compose.dev.yaml stop mongo
-docker volume rm compose_mongo-data
-docker compose -f docker-compose.dev.yaml up -d mongo
+# Verify RustFS is running
+docker compose -f docker-compose.dev.yaml ps rustfs
+
+# Restart RustFS
+docker compose -f docker-compose.dev.yaml restart rustfs
+
+# Test API
+curl http://localhost:8080/health
 ```
 
 ### Issue 5: "Build failed in Visual Studio"
@@ -424,10 +420,10 @@ docker compose -f docker-compose.dev.yaml down -v
 |---------|-----|
 | Scanner (your debug instance) | http://localhost:5210 |
 | PostgreSQL | `localhost:5432` |
-| MongoDB | `localhost:27017` |
-| MinIO Console | http://localhost:9001 |
+| Valkey | `localhost:6379` |
 | RustFS | http://localhost:8080 |
 | Authority | https://localhost:8440 |
+| NATS (optional) | `localhost:4222` |
 
 ---