feat: Implement Phase 3 automation for K8s agent system

Automation components for scheduled and event-driven workflows:

Scheduler:
- scheduler.sh for cron-based workflow execution
- Logs workflow runs to ~/.claude/logs/workflows/
- Notifies dashboard on completion

Alertmanager Integration:
- webhook-receiver.sh for processing alerts
- Dashboard endpoint /api/webhooks/alertmanager
- Example alertmanager-config.yaml with routing rules
- Maps alerts to workflows (crashloop, node issues, resources)

New Incident Workflows:
- node-issue-response.yaml: Handle NotReady/unreachable nodes
- resource-pressure-response.yaml: Respond to memory/CPU overcommit
- argocd-sync-failure.yaml: Investigate and fix sync failures

Dashboard Updates:
- POST /api/webhooks/alertmanager endpoint
- POST /api/workflows/{name}/complete endpoint
- Alerts create pending actions for visibility

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

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

automation/scheduler.sh

@@ -0,0 +1,89 @@
+#!/bin/bash
+# K8s Agent Workflow Scheduler
+# Run workflows on a schedule using Claude Code CLI
+#
+# Usage:
+#   ./scheduler.sh <workflow-name>
+#   ./scheduler.sh cluster-health-check
+#
+# Cron examples:
+#   # Health check every 6 hours
+#   0 */6 * * * /home/will/.claude/automation/scheduler.sh cluster-health-check
+#
+#   # Daily resource report at 8am
+#   0 8 * * * /home/will/.claude/automation/scheduler.sh daily-report
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+CLAUDE_DIR="${SCRIPT_DIR}/.."
+LOG_DIR="${CLAUDE_DIR}/logs/workflows"
+WORKFLOW_DIR="${CLAUDE_DIR}/workflows"
+
+# Ensure log directory exists
+mkdir -p "${LOG_DIR}"
+
+# Get workflow name
+WORKFLOW="${1:-}"
+if [[ -z "${WORKFLOW}" ]]; then
+    echo "Usage: $0 <workflow-name>"
+    echo "Available workflows:"
+    find "${WORKFLOW_DIR}" -name "*.yaml" -o -name "*.md" | while read -r f; do
+        basename "${f}" | sed 's/\.[^.]*$//'
+    done
+    exit 1
+fi
+
+# Find workflow file
+WORKFLOW_FILE=""
+for ext in yaml yml md; do
+    for dir in health deploy incidents; do
+        if [[ -f "${WORKFLOW_DIR}/${dir}/${WORKFLOW}.${ext}" ]]; then
+            WORKFLOW_FILE="${WORKFLOW_DIR}/${dir}/${WORKFLOW}.${ext}"
+            break 2
+        fi
+    done
+done
+
+if [[ -z "${WORKFLOW_FILE}" ]]; then
+    echo "Error: Workflow '${WORKFLOW}' not found"
+    exit 1
+fi
+
+# Generate log filename
+TIMESTAMP=$(date +%Y-%m-%d_%H-%M-%S)
+LOG_FILE="${LOG_DIR}/${WORKFLOW}_${TIMESTAMP}.log"
+
+echo "Running workflow: ${WORKFLOW}"
+echo "Workflow file: ${WORKFLOW_FILE}"
+echo "Log file: ${LOG_FILE}"
+
+# Run Claude Code with the workflow
+# Using --print to get output, --dangerously-skip-permissions for automation
+{
+    echo "=== Workflow: ${WORKFLOW} ==="
+    echo "=== Started: $(date) ==="
+    echo ""
+
+    # Read workflow and pass to Claude Code
+    claude --print --dangerously-skip-permissions \
+        "Run the following workflow: $(cat "${WORKFLOW_FILE}")" \
+        2>&1
+
+    EXIT_CODE=$?
+
+    echo ""
+    echo "=== Completed: $(date) ==="
+    echo "=== Exit code: ${EXIT_CODE} ==="
+} | tee "${LOG_FILE}"
+
+# Notify dashboard of completion (if running)
+DASHBOARD_URL="${DASHBOARD_URL:-http://localhost:8080}"
+if curl -s "${DASHBOARD_URL}/api/health" > /dev/null 2>&1; then
+    curl -s -X POST "${DASHBOARD_URL}/api/workflows/${WORKFLOW}/complete" \
+        -H "Content-Type: application/json" \
+        -d "{\"log_file\": \"${LOG_FILE}\", \"exit_code\": ${EXIT_CODE:-0}}" \
+        > /dev/null 2>&1 || true
+fi
+
+exit ${EXIT_CODE:-0}