BB1: full E40 S16F11 body — MF, PRRECIPEMETHOD, RCPVARS, PRPROCESSPARAMS

Replaces the simplified <L,3 PRJOBID PPID MTRLOUTSPEC> demo body with
the full SEMI E40-0705 §10.2 shape:

  <L,5 PRJOBID MF PRRECIPEMETHOD
       <L,2 PPID <L,n <L,2 RCPPARNM RCPPARVAL>>>
       <L,n MTRLOUTSPEC>
       <L,n <L,2 PARAMNAME PARAMVAL>>>

ProcessJob now carries the extra fields (MaterialFlag, ProcessRecipeMethod,
RcpVar[], ProcessParam[]) so a tool's recipe engine can later consume
the recipe-variable overrides and per-job process parameters.  Server
S16F11 dispatch populates them via the new ProcessJobStore::set_e40_extras
helper after a successful create.

MaterialFlag + ProcessRecipeMethod enums live in their own tiny header
(`e40_constants.hpp`) so process_jobs.hpp (the store) can use them
without dragging in messages_helpers.hpp (which would create a circular
include via data_model.hpp).

The simplified 3-arg HostHandler::send_create_process_job convenience
remains; it constructs a sensible-default PRJobCreateRequest internally.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

apps/secs_server.cpp

@@ -1049,7 +1049,7 @@ int main(int argc, char** argv) {
     auto req = gem::parse_s16f11(msg);
     if (!req) return gem::s16f12_pr_job_create_ack(gem::HostCmdAck::ParameterInvalid);
     auto r = model->process_jobs.create(
-        req->prjobid, req->ppid, req->mtrloutspec,
+        req->prjobid, req->rcpspec.ppid, req->mtrloutspec,
         [model](const std::string& ppid) {
           return model->recipes.get(ppid).has_value();
         });
@@ -1061,7 +1061,25 @@ int main(int argc, char** argv) {
       case gem::ProcessJobStore::CreateResult::Denied_InvalidPpid:
         ack = gem::HostCmdAck::ParameterInvalid; break;
     }
-    logfn("S16F11 PJ=" + req->prjobid + " PPID=" + req->ppid +
+    if (ack == gem::HostCmdAck::Accept) {
+      // Persist the optional E40-0705 trailers (MF / recipe-method /
+      // recipe variables / process parameters) on the freshly created PJ.
+      std::vector<gem::RcpVar> rcpvars;
+      rcpvars.reserve(req->rcpspec.rcpvars.size());
+      for (auto& v : req->rcpspec.rcpvars) rcpvars.push_back({v.name, v.value});
+      std::vector<gem::ProcessParam> params;
+      params.reserve(req->prprocessparams.size());
+      for (auto& p : req->prprocessparams) params.push_back({p.name, p.value});
+      model->process_jobs.set_e40_extras(req->prjobid, req->mf,
+                                          req->prrecipemethod,
+                                          std::move(rcpvars),
+                                          std::move(params));
+    }
+    logfn("S16F11 PJ=" + req->prjobid + " PPID=" + req->rcpspec.ppid +
+          " MF=" + std::to_string(static_cast<int>(req->mf)) +
+          " RM=" + std::to_string(static_cast<int>(req->prrecipemethod)) +
+          " rcpvars=" + std::to_string(req->rcpspec.rcpvars.size()) +
+          " params=" + std::to_string(req->prprocessparams.size()) +
           " -> S16F12 HCACK=" + std::to_string(static_cast<int>(ack)));
     return gem::s16f12_pr_job_create_ack(ack);
   });