feat: expose workflow console api and RPC service with @effect/rpc

- Replace manual JSON-RPC protocol handling with @effect/rpc typed RPCs
- Add evidence capture layer (per-call Ref, response body buffering/reconstruction)
- Add service module with typed dispatch and layer composition via Layer.mergeAll
- Add Hono API with /api/health, /api/connect, /api/rpc routes
- Add browser DTO contracts, error mapping, body size limits
- Add 13 Hono route tests and 12 target-policy tests passing
- Delete old protocol.ts and protocol.test.ts (replaced by rpcs.ts/service.ts)

web/packages/rpc/src/method-registry.ts

@@ -0,0 +1,45 @@
+export type OperationMeta = {
+  readonly method: string;
+  readonly label: string;
+  readonly explanation: string;
+  readonly idempotency: "read";
+  readonly equivalentCli: (params: unknown) => string;
+  readonly interpret: (result: unknown) => unknown;
+};
+
+const registry: ReadonlyMap<string, OperationMeta> = new Map([
+  [
+    "workflow.health",
+    {
+      method: "workflow.health",
+      label: "Health check",
+      explanation: "Check if the workflow server is running",
+      idempotency: "read",
+      equivalentCli: () => "uv run wf status",
+      interpret: (result) => result,
+    },
+  ],
+  [
+    "workflow.sources.list",
+    {
+      method: "workflow.sources.list",
+      label: "List sources",
+      explanation: "List registered data sources with pagination",
+      idempotency: "read",
+      equivalentCli: (params) => {
+        const p = params as { cursor?: string; limit?: number };
+        const parts = ["uv run wf source list"];
+        if (p.limit != null) parts.push(`--limit ${p.limit}`);
+        if (p.cursor != null) parts.push(`--cursor ${p.cursor}`);
+        return parts.join(" ");
+      },
+      interpret: (result) => result,
+    },
+  ],
+]);
+
+export const getOperationMeta = (method: string): OperationMeta | undefined =>
+  registry.get(method);
+
+export const listOperations = (): ReadonlyArray<OperationMeta> =>
+  Array.from(registry.values());