feat(toilscript): emit toil.surface / toilstream.catalog / toildaemon.catalog (M1 Phase 0)

Increment 2: custom-section metadata emission, byte-exact to RECONCILIATION-DECISIONS Part 5.

- buildToilSurface / buildToilStreamCatalog / buildToilDaemonCatalog in dbcatalog.ts
  (CatWriter gains u64), attached in compiler.ts after the toildb sections in the fixed
  order: toildb.catalog -> toildb.types -> toil.surface -> toilstream|toildaemon.
- @scheduled spec parser: interval (30s/5m/1h/1d -> interval_ms, kind 0) and 5-field cron
  (-> minute/hour/dom/month/dow bitmasks, kind 1); diagnostics 9010/9011 wired.
- Coherence hashes: data_coherence and pair_coherence computed over shared @DaTa types so a
  hot pass and a cold pass produce identical values (verified by test); fingerprint is
  mode-distinguishing.
- toil.surface is suppressed only for bare non-Toil AS modules in legacy mode (mirrors how
  toildb.catalog behaves), so the stock compiler fixtures stay byte-identical; any real toil
  artifact (or explicit --targetMode) emits it.
- build_id/abi_version and the export-name fingerprint component are stubbed pending the
  codegen/export increment.
- tests/streams/catalog.mjs: ~80 byte-decode assertions; full compiler suite green.

Author: BlobMaster41

src/compiler.ts

@@ -21,7 +21,10 @@ import {
 
 import {
   buildToilDbCatalog,
-  buildToilDbTypes
+  buildToilDbTypes,
+  buildToilSurface,
+  buildToilStreamCatalog,
+  buildToilDaemonCatalog
 } from "./dbcatalog";
 
 import {
@@ -821,6 +824,26 @@ export class Compiler extends DiagnosticEmitter {
       }
     }
 
+    // Streams + daemon surface sections (spec 03 sections 6/7/8, Part 5 order:
+    // toildb.catalog -> toildb.types -> toil.surface -> stream|daemon catalog).
+    // `toil.surface` is emitted in EVERY mode INCLUDING legacy (targetMode null,
+    // stamped as a hot artifact, Part 5 / doc 02 AN-2), so the host has the
+    // target mode + surface flags + the hot/cold coherence hash.
+    let targetMode = this.options.targetMode;
+    let surface = buildToilSurface(program, targetMode);
+    if (surface != null) module.addCustomSection("toil.surface", surface);
+    if (targetMode != "cold") {
+      // hot or legacy: any @stream class -> toilstream.catalog.
+      let streamCat = buildToilStreamCatalog(program);
+      if (streamCat != null) module.addCustomSection("toilstream.catalog", streamCat);
+    }
+    if (targetMode == "cold") {
+      // cold: a @daemon class -> toildaemon.catalog (parses @scheduled specs,
+      // may fire diagnostics 9010/9011).
+      let daemonCat = buildToilDaemonCatalog(program);
+      if (daemonCat != null) module.addCustomSection("toildaemon.catalog", daemonCat);
+    }
+
     return module;
   }