capsite/lib: endo's own matcher data, smallcaps, and MapStoreDo

Matchers are now exactly what @endo/patterns makes: tagged records as
from pass-style's makeTagged (M.string() is match:string with payload
[], M.any() is match:any with payload undefined). Structured clone drops
their symbol-keyed and non-enumerable properties, so they cross DO
storage and Workers RPC in marshal's smallcaps encoding (the subset
patterns need).

MapStoreDo is a MapStore as a DO of its own: its creator fixes label and
(encoded) shapes once; its id is full authority, and readOnly() hands
out the queries alone.

Generated-by: Claude Opus 5.5

lib/wrangler.tests.jsonc

@@ -5,9 +5,13 @@
 	"main": "./tests/test-worker.ts",
 	"compatibility_date": "2026-09-29",
 	"durable_objects": {
-		"bindings": [{ "name": "STORE_DO", "class_name": "StoreHost" }]
+		"bindings": [
+			{ "name": "STORE_DO", "class_name": "StoreHost" },
+			{ "name": "MAP_STORE_DO", "class_name": "MapStoreDo" }
+		]
 	},
 	"exports": {
-		"StoreHost": { "type": "durable-object", "storage": "sqlite" }
+		"StoreHost": { "type": "durable-object", "storage": "sqlite" },
+		"MapStoreDo": { "type": "durable-object", "storage": "sqlite" }
 	}
 }