Scene Manager: request publishes missing on this site

- Request (globe) on casting rows and loaded assets whose latest publish
  is not on this site, and Request Missing for all of them, through the
  new wtdcmds command wtd_request_revisions. Requested publishes show
  "requested, waiting for the download".
- The version picker requests a version that is not on this site.
- A 404 explains that the session is gone or wtdcmds is too old.
- Fake server: car (vehicles) with a publish not on this site,
  wtd_request_revisions and /_test/download; 45 checks.
- Tested live: car_paul modeling.blend v001 -> Requested.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

dev/fake_libreflow.py

@@ -3,11 +3,12 @@
     python dev/fake_libreflow.py <workdir>
 
 Serves a project with one shot casting bob (main_character, x2), tree (bg_set), rock (main_props),
-lamp (main_props, nothing published) and ghost (not in the flow). The asset files come
+lamp (main_props, nothing published), car (vehicles, v001 not on this site) and ghost (not in the flow). The asset files come
 from dev/make_test_assets.py (<workdir>/lib). Writes <workdir>/kabaret/server.json:
 point config LIBREFLOW_SERVER_FILE to it (see dev/test_scene_manager.py).
 
 Test-only endpoints: POST /_test/publish {file_oid, name, available, path},
+POST /_test/download {revision_oid} (a requested revision reaches this site),
 POST /_test/sessions {uid: session}, POST /_test/calls (commands received).
 State lives in memory: restart the server for a clean state.
 """
@@ -33,10 +34,22 @@ ASSETS = {  # asset oid -> (type, {file_oid: (label, [revisions oldest first])})
     f"{PROJECT}/asset_types/main_props/assets/rock": ("main_props", {f"{PROJECT}/asset_types/main_props/assets/rock/tasks/modeling/files/rock_blend": ("modeling/rock.blend", [
         rev("v001", f"{ROOT}/lib/rock/v001/rock.blend")])}),
     f"{PROJECT}/asset_types/main_props/assets/lamp": ("main_props", {}),
+    f"{PROJECT}/asset_types/vehicles/assets/car": ("vehicles", {f"{PROJECT}/asset_types/vehicles/assets/car/tasks/rigging/files/car_blend": ("rigging/car.blend", [
+        rev("v001", f"{ROOT}/lib/car/v001/car.blend", available=False)])}),
 }
-CASTING = [("bob", "main_character", 2), ("tree", "bg_set", 1), ("rock", "main_props", 1), ("lamp", "main_props", 1), ("ghost", "main_character", 1)]
+CASTING = [("bob", "main_character", 2), ("tree", "bg_set", 1), ("rock", "main_props", 1), ("lamp", "main_props", 1), ("car", "vehicles", 1), ("ghost", "main_character", 1)]
 CALLS = []
 
+def set_oids():
+    for _a, (_t, files) in ASSETS.items():
+        for f, (_l, revs) in files.items():
+            for r in revs: r["oid"] = f"{f}/history/revisions/{r['name']}"
+
+def find_rev(oid):
+    return next((r for _a, (_t, files) in ASSETS.items() for _l, revs in files.values() for r in revs if r["oid"] == oid), None)
+
+set_oids()
+
 def file_data(file_oid):
     for asset_oid, (atype, files) in ASSETS.items():
         if file_oid in files:
@@ -98,6 +111,15 @@ def cmd(name, kw):
             if kw["file_oid"] in files:
                 return list(reversed(files[kw["file_oid"]][1]))
         raise ValueError("No file")
+    if name == "wtd_request_revisions":
+        res = {}
+        for oid in kw["revision_oids"]:
+            r = find_rev(oid)
+            if r is None:
+                res[oid] = {"oid": oid, "error": f"Could not find {oid}"}; continue
+            if not r["available"]: r["sync_status"] = "Requested"
+            res[oid] = r
+        return res
     if name == "wtd_assetize":
         src = kw["source_path"]
         if not os.path.isfile(src): raise ValueError(f"Source file {src} does not exist")
@@ -115,7 +137,7 @@ def cmd(name, kw):
         label, revs = files.setdefault(file_oid, (f"{task}/{fname}.blend", []))
         name = f"v{len(revs) + 1:03d}"
         dest = f"{ROOT}/lib/{aname}/{name}/{fname}.blend"; os.makedirs(os.path.dirname(dest), exist_ok=True); shutil.copy(src, dest)
-        revs.append(rev(name, dest, comment=kw.get("comment", "")))
+        revs.append(rev(name, dest, comment=kw.get("comment", ""))); set_oids()
         return {"asset_oid": asset_oid, "asset_created": created, **file_data(file_oid)}
     raise KeyError(name)
 
@@ -139,6 +161,10 @@ class Handler(BaseHTTPRequestHandler):
             f = body["file_oid"]
             for _a, (_t, files) in ASSETS.items():
                 if f in files: files[f][1].append(rev(body["name"], body.get("path", "/nowhere/" + body["name"]), body.get("available", True)))
+            set_oids()
+            return self.reply(200, {"result": True})
+        if url.path == "/_test/download":
+            r = find_rev(body["revision_oid"]); r["available"] = True; r["sync_status"] = "Available"
             return self.reply(200, {"result": True})
         if url.path == "/_test/sessions":
             SESSIONS.clear(); SESSIONS.update(body); return self.reply(200, {"result": True})