feat(go-crm): full auth, routing, middleware, and supporting infra

- Add auth handlers (signup, login, logout, account management) with bcrypt
- Add client, customer, service, scheduling, payment, question, answer handlers
- Add dashboard, monthly report, and lead pipeline pages
- Add UTF-8 middleware to force charset on HTML responses
- Add config package with env-based overrides for DB path, secrets, endpoints
- Add parser package for WhatsApp message ingestion
- Add clean-arch layers: pkg/domain, pkg/repo, pkg/usecase for leads
- Add cmd/migrate utility for DB migrations
- Add Makefile, README, run-tests.sh, and dev scripts
- Update docker-compose.yml with memory limits
- Update .air.toml to exclude DB files and stop on errors
- Update whatsapp-sync dependencies and add src/index.js entrypoint
- Add whatsme standalone WhatsApp reader app (source only)
- Untrack .opencode-sandbox/data/go-crm.db from git history
- Expand root .gitignore: ngrok, tmp dirs, sandbox DBs, compiled binaries

apps/go-crm/internal/whatsapp/postcontact_test.go

@@ -0,0 +1,36 @@
+package whatsapp
+
+import (
+	"context"
+	"bytes"
+	"log"
+	"os"
+	"strings"
+	"testing"
+)
+
+func TestPostContactLogsErrorOnFailure(t *testing.T) {
+	// Capture log output.
+	var buf bytes.Buffer
+	log.SetOutput(&buf)
+	defer log.SetOutput(os.Stderr)
+
+	// Create adapter with invalid endpoint (connection refused).
+	adapter := &WhatsmeowAdapter{
+		goEndpoint:     "http://localhost:1",
+		internalSecret: "test-secret",
+	}
+
+	contact := Contact{
+		Phone:   "5511999999999",
+		Name:    "Test",
+		Message: "test message",
+	}
+
+	adapter.postContact(context.Background(), 1, contact, "test-msg-id-123")
+
+	output := buf.String()
+	if !strings.Contains(output, "postContact") {
+		t.Errorf("expected log to contain 'postContact', got: %s", output)
+	}
+}