fix(graph): resolve instrument identity to stop wrong-company hallucination

Agents had no ground-truth ticker→company mapping, so the market analyst
could pattern-match a price chart to the wrong company (e.g. TOTDY read as
"TotalEnergies"), and every downstream agent inherited the bad framing.

Resolve identity once at run start via a cached, fail-open yfinance lookup
and inject company/sector/exchange into the shared instrument context that
all twelve agents consume, with an explicit do-not-substitute instruction.
Resolution runs on both the propagate() and CLI entry points.

Also replaces the bare "Continue" message-clear placeholder, which some
OpenAI-compatible providers interpreted as the user task, with a
context-anchored placeholder carrying the resolved identity and date.

#814 #888

cli/main.py

@@ -1098,11 +1098,18 @@ def run_analysis(checkpoint: bool = False):
         )
         update_display(layout, spinner_text, stats_handler=stats_handler, start_time=start_time)
 
-        # Initialize state and get graph args with callbacks
+        # Initialize state and get graph args with callbacks.
+        # Resolve the instrument identity once here so all agents anchor to
+        # the real company (#814); the CLI builds state directly rather than
+        # going through propagate(), so this must happen on the CLI path too.
+        instrument_context = graph.resolve_instrument_context(
+            selections["ticker"], selections["asset_type"]
+        )
         init_agent_state = graph.propagator.create_initial_state(
             selections["ticker"],
             selections["analysis_date"],
             asset_type=selections["asset_type"],
+            instrument_context=instrument_context,
         )
         # Pass callbacks to graph config for tool execution tracking
         # (LLM tracking is handled separately via LLM constructor)