Add doc-random task and documentation improvements (#98)

## Summary
- Add `doc-random` mise task that selects a random documentation card for review
- Add how-to/knowledgebase section with review-documentation guide
- Add Caddy reference card with proxy configuration details
- Fix replication tutorial sequence (tailscale-setup now links to core-services)
- Fix "BluemeOps" typo in tailscale-setup
- Clean up obsolete zk/ directory references from doc-links

## Deployment and Testing
- [x] `mise run doc-random` works and displays a random card
- [x] `mise run doc-links` passes (all wiki-links valid)
- [x] Pre-commit hooks pass

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

Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/98

docs/tutorials/ai-assistance-guide.md

@@ -88,6 +88,7 @@ BlumeOps operations are driven by mise tasks. Run `mise tasks` to list all avail
 | `doc-links` | Validate wiki-links in documentation |
 | `doc-titles` | Check for duplicate doc titles |
 | `doc-filenames` | Check for duplicate doc filenames |
+| `doc-random` | Select a random doc card for review |
 | `indri-runner-logs` | View Forgejo workflow logs from local runner |
 
 For ArgoCD operations, use the `argocd` CLI directly:

docs/tutorials/replication/core-services.md

@@ -9,6 +9,8 @@ tags:
 # Core Services Setup
 
 > **Audiences:** Replicator
+>
+> **Prerequisites:** [[tutorials/replication/tailscale-setup | Tailscale Setup]]
 
 This tutorial walks through setting up the foundational services that your GitOps infrastructure depends on: a git forge and optionally a container registry.
 

docs/tutorials/replication/tailscale-setup.md

@@ -112,12 +112,12 @@ Tags must be defined in ACLs before use.
 ## Next Steps
 
 With networking established:
+- [[tutorials/replication/core-services | Set Up Core Services]] - Install Forgejo and optionally a container registry
 - [[tutorials/replication/kubernetes-bootstrap | Bootstrap Kubernetes]] - Your cluster will join the tailnet
-- Set up your server and storage devices
 
 ## BlumeOps Specifics
 
-BluemeOps' Tailscale configuration includes:
+BlumeOps' Tailscale configuration includes:
 - Multiple device tags (`homelab`, `nas`, `registry`, `k8s-api`)
 - Group-based access for family members
 - SSH access rules with authentication requirements