fix: make devcontainer-reset-db more robust for multiple projects

Detect compose project automatically from current container's Docker labels
rather than guessing from workspace folder name. This allows the script to
work correctly when multiple devcontainers are running on the same machine.

The script now:
- Inspects the current container's compose project label
- Finds the mariadb container using compose project and service labels
- Falls back to workspace-based detection if labels aren't available
- Shows better error messages with a table of available containers

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

Author: kurowski

local/etc/uceap.d/devcontainer_reset_db.sh

@@ -1,26 +1,37 @@
 function devcontainer_reset_db() {
-	# Determine the compose project name from the workspace folder
-	# Use WORKSPACE_FOLDER env var if set by devcontainer, otherwise derive from pwd
-	if [ -n "$WORKSPACE_FOLDER" ]; then
-		WORKSPACE_NAME=$(basename "$WORKSPACE_FOLDER")
-	else
-		WORKSPACE_NAME=$(basename "$(pwd)")
+	# Detect the compose project by inspecting the current container
+	CURRENT_CONTAINER=$(hostname)
+	echo "Running from container: $CURRENT_CONTAINER"
+
+	# Get the compose project name from the current container's labels
+	COMPOSE_PROJECT=$(docker inspect "$CURRENT_CONTAINER" --format '{{index .Config.Labels "com.docker.compose.project"}}' 2>/dev/null)
+
+	if [ -z "$COMPOSE_PROJECT" ]; then
+		echo "Warning: Could not detect compose project from container labels"
+		echo "Falling back to workspace-based detection..."
+		# Fallback to the old method
+		if [ -n "$WORKSPACE_FOLDER" ]; then
+			WORKSPACE_NAME=$(basename "$WORKSPACE_FOLDER")
+		else
+			WORKSPACE_NAME=$(basename "$(pwd)")
+		fi
+		COMPOSE_PROJECT="${COMPOSE_PROJECT_NAME:-${WORKSPACE_NAME}_devcontainer}"
 	fi
-	COMPOSE_PROJECT="${COMPOSE_PROJECT_NAME:-${WORKSPACE_NAME}_devcontainer}"
 
 	echo "Using compose project: $COMPOSE_PROJECT"
 
-	# Get the container name
-	CONTAINER_NAME="${COMPOSE_PROJECT}-mariadb-1"
+	# Find the mariadb container in the same compose project
+	CONTAINER_NAME=$(docker ps -a --filter "label=com.docker.compose.project=$COMPOSE_PROJECT" --filter "label=com.docker.compose.service=mariadb" --format "{{.Names}}" | head -n 1)
 
-	# Verify the container exists
-	if ! docker inspect "$CONTAINER_NAME" &>/dev/null; then
-		echo "Error: Container $CONTAINER_NAME not found"
+	if [ -z "$CONTAINER_NAME" ]; then
+		echo "Error: Could not find mariadb container for project '$COMPOSE_PROJECT'"
 		echo "Available mariadb containers:"
-		docker ps -a --filter "name=mariadb" --format "{{.Names}}"
+		docker ps -a --filter "name=mariadb" --format "table {{.Names}}\t{{.Label \"com.docker.compose.project\"}}"
 		return 1
 	fi
 
+	echo "Found container: $CONTAINER_NAME"
+
 	# Get the volume name from the mariadb container before stopping it
 	VOLUME_NAME=$(docker inspect "$CONTAINER_NAME" --format '{{range .Mounts}}{{if eq .Destination "/var/lib/mysql"}}{{.Name}}{{end}}{{end}}')
 
@@ -29,7 +40,6 @@ function devcontainer_reset_db() {
 		return 1
 	fi
 
-	echo "Found container: $CONTAINER_NAME"
 	echo "Found volume: $VOLUME_NAME"
 
 	# Stop and remove the container