Add operations reference cards

- observability - links to prometheus, loki, alloy, grafana
- backup - links to borgmatic, sifaka, backup policy
- disaster-recovery - TBD, links to borgmatic, 1password, forgejo

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

docs/reference/index.md

@@ -56,3 +56,11 @@ Network storage and backup configuration.
 - [[storage/sifaka|Sifaka]] - Synology NAS configuration
 - [[storage/postgresql|PostgreSQL]] - Database cluster
 - [[storage/backups|Backups]] - Backup policy and schedule
+
+## Operations
+
+Operational concerns and their components.
+
+- [[operations/observability|Observability]] - Metrics, logs, dashboards
+- [[operations/backup|Backup]] - Data protection
+- [[operations/disaster-recovery|Disaster Recovery]] - Recovery procedures (TBD)

docs/reference/operations/backup.md

@@ -0,0 +1,15 @@
+---
+title: Backup
+tags:
+  - operations
+---
+
+# Backup
+
+Daily automated backups of BlumeOps data.
+
+## Components
+
+- [[services/borgmatic|Borgmatic]] - Backup orchestration
+- [[storage/sifaka|Sifaka]] - Backup target (NAS)
+- [[storage/backups|Backup Policy]] - What gets backed up and retention

docs/reference/operations/disaster-recovery.md

@@ -0,0 +1,19 @@
+---
+title: Disaster Recovery
+tags:
+  - operations
+---
+
+# Disaster Recovery
+
+TBD. Current state:
+
+- [[services/borgmatic|Borgmatic]] provides daily backups to [[storage/sifaka|Sifaka]]
+- Infrastructure can be rebootstrapped using the blumeops repo
+- Detailed DR procedures not yet documented
+
+## Components
+
+- [[services/borgmatic|Borgmatic]] - Backup restoration
+- [[services/1password|1Password]] - Credential recovery
+- [[services/forgejo|Forgejo]] - Source of truth for infrastructure code

docs/reference/operations/observability.md

@@ -0,0 +1,16 @@
+---
+title: Observability
+tags:
+  - operations
+---
+
+# Observability
+
+Metrics, logs, and dashboards for BlumeOps infrastructure.
+
+## Components
+
+- [[services/prometheus|Prometheus]] - Metrics storage and querying
+- [[services/loki|Loki]] - Log aggregation
+- [[services/alloy|Alloy]] - Metrics and log collection
+- [[services/grafana|Grafana]] - Dashboards and visualization