fix(projekt-matching): rename component input ctx -> ctx_in (Langflow reserves Component.ctx)

Langflow 1.10's Component base class defines ctx as a @property returning
the flow-level graph.context store; a DataInput named ctx is silently
shadowed at attribute access, so the edge-delivered payload never reaches
build_out(). Renamed the field in the five downstream Flow-2 wrappers;
build_flows.py edges target ctx_in.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

projekt-matching/components/pm_notify.py

@@ -15,7 +15,7 @@ class PMNotify(Component):
     display_name = "PM 6 Notify"
     description = "Benachrichtigungs-Mail bei created + Langfuse-Trace"
     inputs = [
-        DataInput(name="ctx", display_name="Context"),
+        DataInput(name="ctx_in", display_name="Context"),
         SecretStrInput(name="imap_password", display_name="Mail Password",
                        value="PM_IMAP_PASSWORD", load_from_db=True,
                        advanced=True),
@@ -29,6 +29,6 @@ class PMNotify(Component):
         cfg = Cfg(imap_password=self.imap_password, notify_to=self.notify_to)
         # stage_notify is called DIRECTLY (not via run_stage): it must run for
         # every terminal status so failed runs still post their Langfuse trace.
-        ctx = stages.stage_notify(dict(self.ctx.data), cfg)
+        ctx = stages.stage_notify(dict(self.ctx_in.data), cfg)
         self.status = ctx.get("status", "")
         return Message(text=stages.summary(ctx))