Add headless parallel eu7v2 scenario bake with streaming and PLCE placements

Enable --eu7v2-bake from the main binary: parallel module pool, bounded-RAM
spool flush, streaming terrain triangles, flat include/model parsing, and
eu7v2 emit/load with optional verify. Large placement .scm files emit lean
PLCE records and bake referenced .inc modules separately for reuse.

- CLI: --eu7v2-bake, --eu7v2-verify, --eu7v2-mem-limit-gb, --eu7v2-threads,
  --eu7v2-max-parse; wire max_threads through to the bake parser
- eu7v2 v2 records: PLCE placements, runtime emitter/loader, batch verify
- Parallel bake pool with session cache; drop heavy-serial parse gate in spool
  mode; parse concurrency matches thread count
- Streaming terrain: batched parallel parse+bake, scan/bake pipeline, shape
  spool with persistent buffered I/O and flush-before-read
- Parallel flat-file streaming for models/includes; pack/model spool for
  low-memory incremental flush
- Optional 50 GB private-bytes guard during headless bake

Braniewo_szeroki: 160 modules, verify PASS, ~34s bake (nmt100 ~17s vs ~190s
serial baseline).

Co-authored-by: Cursor <cursoragent@cursor.com>

utilities/Globals.cpp

@@ -662,6 +662,18 @@ bool global_settings::ConfigParseSimulation(cParser& Parser, const std::string&
         return true;
     }
 
+    if (token == "eu7.bake.cpu.percent")
+    {
+        ParseOneClamped(Parser, eu7_bake_cpu_percent, 1, 100);
+        return true;
+    }
+
+    if (token == "eu7.v2.runtime")
+    {
+        ParseOne(Parser, eu7v2_runtime, 1, false);
+        return true;
+    }
+
     if (token == "inactivepause")
     {
         ParseOne(Parser, bInactivePause);
@@ -1616,6 +1628,8 @@ global_settings::export_as_text( std::ostream &Output ) const {
     export_as_text( Output, "eu7.pack.mesh.loader.workers", eu7_pack_mesh_loader_workers );
     export_as_text( Output, "eu7.auto.bake", eu7_auto_bake );
     export_as_text( Output, "eu7.bake.threads", eu7_bake_threads );
+    export_as_text( Output, "eu7.bake.cpu.percent", eu7_bake_cpu_percent );
+    export_as_text( Output, "eu7.v2.runtime", eu7v2_runtime );
     export_as_text( Output, "inactivepause", bInactivePause );
     export_as_text( Output, "slowmotion", iSlowMotionMask );
     export_as_text( Output, "hideconsole", bHideConsole );