Strip trailing slash from ITX base URL to prevent double slashes

- Add strings.TrimRight() in NewClient to strip trailing slash from config.BaseURL
- Prevents double slash issues like "https://api.example.com//v2/zoom/meetings"
- All URL constructions use fmt.Sprintf with hardcoded "/" prefix in paths
- Ensures consistent URL parsing regardless of base URL configuration

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

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

Signed-off-by: Andres Tobon <andrest2455@gmail.com>

Author: andrest50

charts/lfx-v2-meeting-service/Chart.yaml

@@ -5,5 +5,5 @@ apiVersion: v2
 name: lfx-v2-meeting-service
 description: LFX Platform V2 Meeting Service chart
 type: application
-version: 0.6.3
+version: 0.6.4
 appVersion: "latest"

internal/infrastructure/proxy/client.go

@@ -12,6 +12,7 @@ import (
 	"log/slog"
 	"net/http"
 	"net/url"
+	"strings"
 	"time"
 
 	"github.com/auth0/go-auth0/authentication"
@@ -87,6 +88,9 @@ func NewClient(config Config) *Client {
 		panic("ITX_CLIENT_PRIVATE_KEY is required but not set")
 	}
 
+	// Strip trailing slash from base URL to prevent double slashes in URL construction
+	config.BaseURL = strings.TrimRight(config.BaseURL, "/")
+
 	// Create Auth0 authentication client with private key assertion (JWT)
 	// The private key should be in PEM format (raw, not base64-encoded)
 	authConfig, err := authentication.New(