Odoo ERP ported to Go — complete backend + original OWL frontend

Full port of Odoo's ERP system from Python to Go, with the original
Odoo JavaScript frontend (OWL framework) running against the Go server.

Backend (10,691 LoC Go):
- Custom ORM: CRUD, domains→SQL with JOINs, computed fields, sequences
- 93 models across 14 modules (base, account, sale, stock, purchase, hr,
  project, crm, fleet, product, l10n_de, google_address/translate/calendar)
- Auth with bcrypt + session cookies
- Setup wizard (company, SKR03 chart, admin, demo data)
- Double-entry bookkeeping constraint
- Sale→Invoice workflow (confirm SO → generate invoice → post)
- SKR03 chart of accounts (110 accounts) + German taxes (USt/VSt)
- Record rules (multi-company filter)
- Google integrations as opt-in modules (Maps, Translate, Calendar)

Frontend:
- Odoo's original OWL webclient (503 JS modules, 378 XML templates)
- JS transpiled via Odoo's js_transpiler (ES modules → odoo.define)
- SCSS compiled to CSS (675KB) via dart-sass
- XML templates compiled to registerTemplate() JS calls
- Static file serving from Odoo source addons
- Login page, session management, menu navigation
- Contacts list view renders with real data from PostgreSQL

Infrastructure:
- 14MB single binary (CGO_ENABLED=0)
- Docker Compose (Go server + PostgreSQL 16)
- Zero phone-home (no outbound calls to odoo.com)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pkg/server/fields_get.go

@@ -0,0 +1,57 @@
+package server
+
+import "odoo-go/pkg/orm"
+
+// fieldsGetForModel returns field metadata for a model.
+// Mirrors: odoo/orm/models.py BaseModel.fields_get()
+func fieldsGetForModel(modelName string) map[string]interface{} {
+	m := orm.Registry.Get(modelName)
+	if m == nil {
+		return map[string]interface{}{}
+	}
+
+	result := make(map[string]interface{})
+	for name, f := range m.Fields() {
+		fieldInfo := map[string]interface{}{
+			"name":       name,
+			"type":       f.Type.String(),
+			"string":     f.String,
+			"help":       f.Help,
+			"readonly":   f.Readonly,
+			"required":   f.Required,
+			"searchable": f.IsStored(),
+			"sortable":   f.IsStored(),
+			"store":      f.IsStored(),
+			"manual":     false,
+			"depends":    f.Depends,
+			"groupable":  f.IsStored() && f.Type != orm.TypeText && f.Type != orm.TypeHTML,
+			"exportable": true,
+			"change_default": false,
+		}
+
+		// Relational fields
+		if f.Comodel != "" {
+			fieldInfo["relation"] = f.Comodel
+		}
+		if f.InverseField != "" {
+			fieldInfo["relation_field"] = f.InverseField
+		}
+
+		// Selection
+		if f.Type == orm.TypeSelection && len(f.Selection) > 0 {
+			sel := make([][]string, len(f.Selection))
+			for i, item := range f.Selection {
+				sel[i] = []string{item.Value, item.Label}
+			}
+			fieldInfo["selection"] = sel
+		}
+
+		// Domain & context defaults
+		fieldInfo["domain"] = "[]"
+		fieldInfo["context"] = "{}"
+
+		result[name] = fieldInfo
+	}
+
+	return result
+}