Add VPN configuration tools and agent documentation

Created comprehensive VPN setup tooling for Peaceful Spirit L2TP/IPsec connection
and enhanced agent documentation framework.

VPN Configuration (PST-NW-VPN):
- Setup-PST-L2TP-VPN.ps1: Automated L2TP/IPsec setup with split-tunnel and DNS
- Connect-PST-VPN.ps1: Connection helper with PPP adapter detection, DNS (192.168.0.2), and route config (192.168.0.0/24)
- Connect-PST-VPN-Standalone.ps1: Self-contained connection script for remote deployment
- Fix-PST-VPN-Auth.ps1: Authentication troubleshooting for CHAP/MSChapv2
- Diagnose-VPN-Interface.ps1: Comprehensive VPN interface and routing diagnostic
- Quick-Test-VPN.ps1: Fast connectivity verification (DNS/router/routes)
- Add-PST-VPN-Route-Manual.ps1: Manual route configuration helper
- vpn-connect.bat, vpn-disconnect.bat: Simple batch file shortcuts
- OpenVPN config files (Windows-compatible, abandoned for L2TP)

Key VPN Implementation Details:
- L2TP creates PPP adapter with connection name as interface description
- UniFi auto-configures DNS (192.168.0.2) but requires manual route to 192.168.0.0/24
- Split-tunnel enabled (only remote traffic through VPN)
- All-user connection for pre-login auto-connect via scheduled task
- Authentication: CHAP + MSChapv2 for UniFi compatibility

Agent Documentation:
- AGENT_QUICK_REFERENCE.md: Quick reference for all specialized agents
- documentation-squire.md: Documentation and task management specialist agent
- Updated all agent markdown files with standardized formatting

Project Organization:
- Moved conversation logs to dedicated directories (guru-connect-conversation-logs, guru-rmm-conversation-logs)
- Cleaned up old session JSONL files from projects/msp-tools/
- Added guru-connect infrastructure (agent, dashboard, proto, scripts, .gitea workflows)
- Added guru-rmm server components and deployment configs

Technical Notes:
- VPN IP pool: 192.168.4.x (client gets 192.168.4.6)
- Remote network: 192.168.0.0/24 (router at 192.168.0.10)
- PSK: rrClvnmUeXEFo90Ol+z7tfsAZHeSK6w7
- Credentials: pst-admin / 24Hearts$

Files: 15 VPN scripts, 2 agent docs, conversation log reorganization,
guru-connect/guru-rmm infrastructure additions

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

projects/msp-tools/guru-rmm/server/src/api/metrics.rs

@@ -0,0 +1,65 @@
+//! Metrics API endpoints
+
+use axum::{
+    extract::{Path, Query, State},
+    http::StatusCode,
+    Json,
+};
+use chrono::{DateTime, Duration, Utc};
+use serde::Deserialize;
+use uuid::Uuid;
+
+use crate::db::{self, Metrics, MetricsSummary};
+use crate::AppState;
+
+/// Query parameters for metrics
+#[derive(Debug, Deserialize)]
+pub struct MetricsQuery {
+    /// Number of records to return (default: 100)
+    pub limit: Option<i64>,
+
+    /// Start time for range query
+    pub start: Option<DateTime<Utc>>,
+
+    /// End time for range query
+    pub end: Option<DateTime<Utc>>,
+}
+
+/// Get metrics for a specific agent
+pub async fn get_agent_metrics(
+    State(state): State<AppState>,
+    Path(id): Path<Uuid>,
+    Query(query): Query<MetricsQuery>,
+) -> Result<Json<Vec<Metrics>>, (StatusCode, String)> {
+    // First verify the agent exists
+    let agent = db::get_agent_by_id(&state.db, id)
+        .await
+        .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()))?
+        .ok_or((StatusCode::NOT_FOUND, "Agent not found".to_string()))?;
+
+    let metrics = if let (Some(start), Some(end)) = (query.start, query.end) {
+        // Range query
+        db::get_agent_metrics_range(&state.db, id, start, end)
+            .await
+            .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()))?
+    } else {
+        // Simple limit query
+        let limit = query.limit.unwrap_or(100).min(1000); // Cap at 1000
+        db::get_agent_metrics(&state.db, id, limit)
+            .await
+            .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()))?
+    };
+
+    Ok(Json(metrics))
+}
+
+/// Get summary metrics across all agents
+pub async fn get_summary(
+    State(state): State<AppState>,
+) -> Result<Json<MetricsSummary>, (StatusCode, String)> {
+    let summary = db::get_metrics_summary(&state.db)
+        .await
+        .map_err(|e| (StatusCode::INTERNAL_SERVER_ERROR, e.to_string()))?;
+
+    Ok(Json(summary))
+}