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/deployment/VERSION_MATRIX.md

@@ -46,11 +46,10 @@
 
 | Component | Version | Digest | Notes |
 |-----------|---------|--------|-------|
-| MongoDB | `7.0` | `sha256:c258b26dbb7774f97f52aff52231ca5f228273a84329c5f5e451c3739457db49` | Primary database |
-| PostgreSQL | `16-alpine` | N/A | Scheduler/metadata |
-| MinIO | `RELEASE.2024-01-01` | `sha256:14cea493d9a34af32f524e538b8346cf79f3321eff8e708c1e2960462bd8936e` | Object storage |
-| NATS | `2.10` | `sha256:c82559e4476289481a8a5196e675ebfe67eea81d95e5161e3e78eccfe766608e` | Message queue |
-| RustFS | `2025.10.0-edge` | N/A | Content-addressed storage |
+| PostgreSQL | `16-alpine` | N/A | Primary database (REQUIRED) |
+| Valkey | `8.0` | N/A | Cache, DPoP security (REQUIRED) |
+| RustFS | `2025.10.0-edge` | N/A | Object storage (REQUIRED) |
+| NATS | `2.10` | `sha256:c82559e4476289481a8a5196e675ebfe67eea81d95e5161e3e78eccfe766608e` | Message queue (optional) |
 
 ---
 
@@ -81,7 +80,7 @@ registry.stella-ops.org/stellaops/airgap-bundle:2025.09.2
 
 Bundle contents:
 - All core services at matching version
-- Infrastructure containers (Mongo, MinIO, NATS)
+- Infrastructure containers (PostgreSQL, Valkey, RustFS, NATS)
 - CLI tools and migration utilities
 - Offline kit documentation
 
@@ -213,7 +212,7 @@ services:
 ### Startup Order
 
 ```
-1. Infrastructure (MongoDB, NATS, MinIO)
+1. Infrastructure (PostgreSQL, Valkey, RustFS, NATS)
    ↓
 2. Core Auth (Authority, Signer)
    ↓