feat: rename rails/ to tools/ and add service tool suites

Rename the `rails/` directory to `tools/` for agent discoverability —
agents frequently failed to locate helper scripts due to the non-intuitive
directory name. Add backward-compat symlink `rails/ → tools/`.

New tool suites:
- Authentik: auth-token, user-list, user-create, group-list, app-list,
  flow-list, admin-status (8 scripts)
- Coolify: team-list, project-list, service-list, service-status, deploy,
  env-set (7 scripts)
- Woodpecker: pipeline-list, pipeline-status, pipeline-trigger (3 stubs)
- GLPI: session-init, computer-list, ticket-list, ticket-create, user-list
  (6 scripts)
- Health: stack-health.sh — stack-wide connectivity check

Infrastructure:
- Shared credential loader at tools/_lib/credentials.sh
- install.sh creates symlink + chmod on tool scripts
- All ~253 rails/ path references updated across 68+ files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tools/portainer/stack-start.sh

@@ -0,0 +1,114 @@
+#!/usr/bin/env bash
+#
+# stack-start.sh - Start an inactive Portainer stack
+#
+# Usage: stack-start.sh -n <stack-name>
+#
+# Environment variables:
+#   PORTAINER_URL     - Portainer instance URL (e.g., https://portainer.example.com:9443)
+#   PORTAINER_API_KEY - API access token
+#
+# Options:
+#   -n name           Stack name (required)
+#   -i id             Stack ID (alternative to -n)
+#   -h                Show this help
+
+set -euo pipefail
+
+# Default values
+STACK_NAME=""
+STACK_ID=""
+
+# Parse arguments
+while getopts "n:i:h" opt; do
+    case $opt in
+        n) STACK_NAME="$OPTARG" ;;
+        i) STACK_ID="$OPTARG" ;;
+        h)
+            head -16 "$0" | grep "^#" | sed 's/^# \?//'
+            exit 0
+            ;;
+        *)
+            echo "Usage: $0 -n <stack-name>" >&2
+            exit 1
+            ;;
+    esac
+done
+
+# Validate environment
+if [[ -z "${PORTAINER_URL:-}" ]]; then
+    echo "Error: PORTAINER_URL environment variable not set" >&2
+    exit 1
+fi
+
+if [[ -z "${PORTAINER_API_KEY:-}" ]]; then
+    echo "Error: PORTAINER_API_KEY environment variable not set" >&2
+    exit 1
+fi
+
+if [[ -z "$STACK_NAME" && -z "$STACK_ID" ]]; then
+    echo "Error: Either -n <stack-name> or -i <stack-id> is required" >&2
+    exit 1
+fi
+
+# Remove trailing slash from URL
+PORTAINER_URL="${PORTAINER_URL%/}"
+
+# Function to make API requests
+api_request() {
+    local method="$1"
+    local endpoint="$2"
+
+    curl -s -w "\n%{http_code}" -X "$method" \
+        -H "X-API-Key: ${PORTAINER_API_KEY}" \
+        "${PORTAINER_URL}${endpoint}"
+}
+
+# Get stack info by name
+if [[ -n "$STACK_NAME" ]]; then
+    response=$(api_request GET "/api/stacks")
+    http_code=$(echo "$response" | tail -n1)
+    body=$(echo "$response" | sed '$d')
+
+    if [[ "$http_code" != "200" ]]; then
+        echo "Error: Failed to list stacks (HTTP $http_code)" >&2
+        exit 1
+    fi
+
+    stack_info=$(echo "$body" | jq --arg name "$STACK_NAME" '.[] | select(.Name == $name)')
+
+    if [[ -z "$stack_info" || "$stack_info" == "null" ]]; then
+        echo "Error: Stack '$STACK_NAME' not found" >&2
+        exit 1
+    fi
+
+    STACK_ID=$(echo "$stack_info" | jq -r '.Id')
+    ENDPOINT_ID=$(echo "$stack_info" | jq -r '.EndpointId')
+else
+    response=$(api_request GET "/api/stacks/${STACK_ID}")
+    http_code=$(echo "$response" | tail -n1)
+    body=$(echo "$response" | sed '$d')
+
+    if [[ "$http_code" != "200" ]]; then
+        echo "Error: Failed to get stack (HTTP $http_code)" >&2
+        exit 1
+    fi
+
+    stack_info="$body"
+    STACK_NAME=$(echo "$stack_info" | jq -r '.Name')
+    ENDPOINT_ID=$(echo "$stack_info" | jq -r '.EndpointId')
+fi
+
+echo "Starting stack '$STACK_NAME' (ID: $STACK_ID)..."
+
+response=$(api_request POST "/api/stacks/${STACK_ID}/start?endpointId=${ENDPOINT_ID}")
+http_code=$(echo "$response" | tail -n1)
+body=$(echo "$response" | sed '$d')
+
+if [[ "$http_code" == "200" ]]; then
+    echo "Successfully started stack '$STACK_NAME'"
+else
+    echo "Error: Failed to start stack (HTTP $http_code)" >&2
+    echo "$body" | jq '.' 2>/dev/null || echo "$body" >&2
+    exit 1
+fi