refactor: untangle bootstrapContext into makeConsole/makeLibs/runLibrary

Remove the shared-mutable-state dance where each db library was run in
the handler context via `context.sql = x; run; module.exports = null`.
Split into three single-purpose functions:

- makeConsole(structureId, routeId) — the logs-table-backed console
- runLibrary(sql, source, console) — eval one library in its own context
- makeLibs(structureId, console) — the require() targets map

Libraries are still evaluated eagerly per request (no laziness), and
still see `sql` and `console`, so behavior is preserved. Verified the
prime db library's top-level console.log still fires on a live request.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

index.js

@@ -83,53 +83,55 @@ async function saveFile(structureId, req, uploadedFile, asset=false) {
   return file
 }
 
-function bootstrapContext(structureId, routeId, initContext) {
-  const allDbInstances = {};
-  function getDb(alias) {
-    return allDbInstances[alias];
+// A console whose log() mirrors to stdout and to the structure's logs table.
+function makeConsole(structureId, routeId) {
+  return {
+    log: function (...content) {
+      content.forEach((c) => console.log(c));
+      model.createLog(structureId, routeId, inspectArgs(content));
+    },
+  };
+}
+
+// Evaluate a db's "library" script with `sql` and `console` bound, returning
+// its exports. Each library runs in its own context so nothing leaks between dbs.
+function runLibrary(sql, librarySource, console) {
+  const libContext = vm.createContext({ sql, console, module: { exports: null } });
+  vm.runInContext(librarySource, libContext);
+  return libContext.module.exports;
+}
+
+// The `require(name)` targets available to a user handler.
+function makeLibs(structureId, console) {
+  const dbs = {};
+  for (let appDb of model.getDbsForStructure(structureId)) {
+    const sql = model.getDbInstance(appDb.id);
+    dbs[appDb.alias] = { library: runLibrary(sql, appDb.library, console), sql };
   }
+  return {
+    eta: model.getTemplater(structureId),
+    db: (alias) => dbs[alias],
+    push: webPush,
+    files: { saveFile: (...args) => saveFile(structureId, ...args) },
+  };
+}
 
-  // todo wrap template in data-bliss-edit-template thing since ws can't take us to the editor on a component basis?? maybe...
-  // for now just designing with component approach
-  const eta = model.getTemplater(structureId);
-  const structure = model.getStructure(structureId)
-  const __urlPrefix = structure.route_prefix;
+function bootstrapContext(structureId, routeId, initContext) {
+  const structure = model.getStructure(structureId);
+  const console = makeConsole(structureId, routeId);
+  const libs = makeLibs(structureId, console);
 
-  const libs = { eta, db: getDb, push: webPush, files: { saveFile: (...args) => saveFile(structureId, ...args) } };
-
-  let dbs = model.getDbsForStructure(structureId);
-  let context = vm.createContext({
+  return vm.createContext({
     ...initContext,
-    require: function (str) {
-      return libs[str];
-    },
+    require: (name) => libs[name],
     module: { exports: null },
-    console: {
-      log: function (...content) {
-        content.forEach((c) => console.log(c));
-        model.createLog(structureId, routeId, inspectArgs(content));
-      },
-    },
+    console,
     vapidPublicKey: vapidPublicKey,
     fetch: fetch,
     clearTimeout: clearTimeout,
     setTimeout: setTimeout,
-    route: function (url) {
-      return withPrefix(__urlPrefix, url);
-    },
+    route: makeRoute(structure),
   });
-  for (let appDb of dbs) {
-    let dbInstance = model.getDbInstance(appDb.id);
-    context.sql = dbInstance;
-    vm.runInContext(appDb.library, context);
-    allDbInstances[appDb.alias] = {
-      library: context.module.exports,
-      sql: dbInstance,
-    };
-    context.module.exports = null;
-  }
-
-  return context;
 }
 
 function withPrefix(prefix, url) {