initial: import DOLPHIN baseline 2026-04-21 from dolphinng5_predict working tree

Includes core prod + GREEN/BLUE subsystems:
- prod/ (BLUE harness, configs, scripts, docs)
- nautilus_dolphin/ (GREEN Nautilus-native impl + dvae/ preserved)
- adaptive_exit/ (AEM engine + models/bucket_assignments.pkl)
- Observability/ (EsoF advisor, TUI, dashboards)
- external_factors/ (EsoF producer)
- mc_forewarning_qlabs_fork/ (MC regime/envelope)

Excludes runtime caches, logs, backups, and reproducible artifacts per .gitignore.

Observability/TUI/textual_poc.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+"""
+Minimal Textual proof-of-concept.
+Run: python3 textual_poc.py
+Press q to quit.
+"""
+from textual.app import App, ComposeResult
+from textual.widgets import Static, Header, Footer
+from textual.containers import Horizontal
+import time
+
+
+class Box(Static):
+    def on_mount(self) -> None:
+        self.update(self.id or "box")
+
+
+class PocApp(App):
+    CSS = """
+    Screen { background: #111; }
+    Box {
+        border: solid green;
+        height: 8;
+        content-align: center middle;
+        color: white;
+    }
+    #clock { border: solid cyan; height: 3; }
+    """
+
+    BINDINGS = [("q", "quit", "Quit")]
+
+    def compose(self) -> ComposeResult:
+        yield Static(id="clock")
+        with Horizontal():
+            yield Box("PANEL A\nstatic text", id="panel_a")
+            yield Box("PANEL B\nstatic text", id="panel_b")
+            yield Box("PANEL C\nstatic text", id="panel_c")
+        yield Static("[green]q=quit[/green]  |  Textual POC running OK")
+
+    def on_mount(self) -> None:
+        self.set_interval(1, self._tick)
+        self._tick()
+
+    def _tick(self) -> None:
+        t = time.strftime("%Y-%m-%d %H:%M:%S UTC", time.gmtime())
+        self.query_one("#clock", Static).update(
+            f"[bold cyan]🐬 DOLPHIN TUI POC[/bold cyan]  |  {t}  |  Textual is working"
+        )
+        # Update panels with incrementing counter
+        n = int(time.time()) % 100
+        self.query_one("#panel_a", Box).update(
+            f"[green]PANEL A[/green]\nvalue = {n}\nstatus = OK"
+        )
+        self.query_one("#panel_b", Box).update(
+            f"[yellow]PANEL B[/yellow]\nvalue = {n*2}\nstatus = WARN"
+        )
+        self.query_one("#panel_c", Box).update(
+            f"[red]PANEL C[/red]\nvalue = {n*3}\nstatus = CRIT"
+        )
+
+
+if __name__ == "__main__":
+    PocApp().run()