Complete ORM gaps + server features + module depth push

ORM:
- SQL Constraints support (Model.AddSQLConstraint, applied in InitDatabase)
- Translatable field Read (ir_translation lookup for non-en_US)
- active_test filter in SearchCount + ReadGroup (consistency with Search)
- Environment.Ref() improved (format validation, parameterized query)

Server:
- /web/action/run endpoint (server action execution stub)
- /web/model/get_definitions (field metadata for multiple models)
- Binary field serving rewritten: reads from DB, falls back to SVG
  with record initial (fixes avatar/logo rendering)

Business modules deepened:
- Account: action_post validation (partner, lines), sequence numbering
  (JOURNAL/YYYY/NNNN), action_register_payment, remove_move_reconcile
- Sale: action_cancel, action_draft, action_view_invoice
- Purchase: button_draft
- Stock: action_cancel on picking
- CRM: action_set_won_rainbowman, convert_opportunity
- HR: hr.contract model (employee, wage, dates, state)
- Project: action_blocked, task stage seed data

Views:
- Cancel/Reset buttons in sale.form header
- Register Payment button in invoice.form (visible when posted+unpaid)

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

pkg/orm/environment.go

@@ -3,6 +3,8 @@ package orm
 import (
 	"context"
 	"fmt"
+	"strconv"
+	"strings"
 
 	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgxpool"
@@ -76,13 +78,23 @@ func (env *Environment) Model(name string) *Recordset {
 // Ref returns a record by its XML ID (external identifier).
 // Mirrors: self.env.ref('module.xml_id')
 func (env *Environment) Ref(xmlID string) (*Recordset, error) {
+	// Try direct integer ID (for programmatic use) — reject since model is unknown
+	if id, err := strconv.ParseInt(xmlID, 10, 64); err == nil {
+		return nil, fmt.Errorf("orm: ref requires module.name format, not bare ID %d", id)
+	}
+
 	// Query ir_model_data for the external ID
 	var resModel string
 	var resID int64
 
+	parts := strings.SplitN(xmlID, ".", 2)
+	if len(parts) != 2 {
+		return nil, fmt.Errorf("orm: ref %q must be module.name format", xmlID)
+	}
+
 	err := env.tx.QueryRow(env.ctx,
-		`SELECT model, res_id FROM ir_model_data WHERE module || '.' || name = $1 LIMIT 1`,
-		xmlID,
+		`SELECT model, res_id FROM ir_model_data WHERE module = $1 AND name = $2 LIMIT 1`,
+		parts[0], parts[1],
 	).Scan(&resModel, &resID)
 	if err != nil {
 		return nil, fmt.Errorf("orm: ref %q not found: %w", xmlID, err)