feat(11.1-04): add the Database section and the core Services pages

- docs/database: models, migrations, queries and pagination, relations,
  casts and validation, attachments and transactions (lagoon.Transaction,
  lagoon.AfterCommit, nested savepoints, lagoon.OnDatabase)
- docs/services: configuration, events, routing with auth groups, rate
  limiting, authentication, the OAuth server, mail and localization
- runnable Examples for lagoon, attach, compass, surf, wire, bouncer,
  wristband, postcard, phrasebook and festival; lagoon TestDocs* regions
  run on the package's Postgres harness through DocsDB
- 15 new required pages

modules/wire/example_test.go

@@ -0,0 +1,45 @@
+package wire_test
+
+import (
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"time"
+
+	"git.golem15.com/golem15/summercms/modules/wire"
+)
+
+// postJSON is the response shape of one acme.blog post.
+type postJSON struct {
+	ID          uint         `json:"id"`
+	Title       string       `json:"title"`
+	Tags        []string     `json:"tags"`
+	Featured    wire.TriBool `json:"featured"`
+	Pinned      wire.TriBool `json:"pinned"`
+	PublishedAt wire.Time    `json:"published_at"`
+}
+
+func ExampleWriteJSON() {
+	var tags []string // nil: the post has no tags
+	warsaw := time.FixedZone("CEST", 2*60*60)
+	body := postJSON{
+		ID:          1,
+		Title:       "Tips & <tricks>",
+		Tags:        wire.Slice(tags),
+		Featured:    wire.TriBool{},
+		Pinned:      wire.TriBool{Value: true, Valid: true},
+		PublishedAt: wire.Time{Time: time.Date(2026, 9, 30, 14, 5, 0, 0, warsaw)},
+	}
+	rec := httptest.NewRecorder()
+	wire.WriteJSON(rec, http.StatusOK, map[string]any{"data": body})
+	fmt.Println(rec.Code, rec.Header().Get("Content-Type"))
+	fmt.Printf("%s|\n", rec.Body.String())
+
+	rec = httptest.NewRecorder()
+	wire.WriteOpaque500(rec)
+	fmt.Println(rec.Code, rec.Body.String())
+	// Output:
+	// 200 application/json
+	// {"data":{"id":1,"title":"Tips & <tricks>","tags":[],"featured":null,"pinned":true,"published_at":"2026-09-30T12:05:00+00:00"}}|
+	// 500 {"error":true,"message":"Internal server error"}
+}