feat(agent): complete EvoAgent integration for all 6 agent roles

Migrate all agent roles from Legacy to EvoAgent architecture:
- fundamentals_analyst, technical_analyst, sentiment_analyst, valuation_analyst
- risk_manager, portfolio_manager

Key changes:
- EvoAgent now supports Portfolio Manager compatibility methods (_make_decision,
  get_decisions, get_portfolio_state, load_portfolio_state, update_portfolio)
- Add UnifiedAgentFactory for centralized agent creation
- ToolGuard with batch approval API and WebSocket broadcast
- Legacy agents marked deprecated (AnalystAgent, RiskAgent, PMAgent)
- Remove backend/agents/compat.py migration shim
- Add run_id alongside workspace_id for semantic clarity
- Complete integration test coverage (13 tests)
- All smoke tests passing for 6 agent roles

Constraint: Must maintain backward compatibility with existing run configs
Constraint: Memory support must work with EvoAgent (no fallback to Legacy)
Rejected: Separate PM implementation for EvoAgent | unified approach cleaner
Confidence: high
Scope-risk: broad
Directive: EVO_AGENT_IDS env var still respected but defaults to all roles
Not-tested: Kubernetes sandbox mode for skill execution

backend/agents/portfolio_manager.py

@@ -2,8 +2,13 @@
 """
 Portfolio Manager Agent - Based on AgentScope ReActAgent
 Responsible for decision-making (NOT trade execution)
-"""
 
+.. deprecated:: 0.2.0
+    PMAgent is deprecated and will be removed in a future version.
+    Use :class:`backend.agents.base.evo_agent.EvoAgent` instead.
+    See docs/CRITICAL_FIXES.md for migration guide.
+"""
+import warnings
 from pathlib import Path
 from typing import Any, Dict, Optional, Callable
 
@@ -17,11 +22,31 @@ from .prompt_factory import build_agent_system_prompt, clear_prompt_factory_cach
 from .team_pipeline_config import update_active_analysts
 from ..config.constants import ANALYST_TYPES
 
+# Emit deprecation warning on module import
+warnings.warn(
+    "PMAgent is deprecated. Use EvoAgent instead. "
+    "See docs/CRITICAL_FIXES.md for migration guide.",
+    DeprecationWarning,
+    stacklevel=2,
+)
+
 
 class PMAgent(ReActAgent):
     """
     Portfolio Manager Agent - Makes investment decisions
 
+    Key features:
+    1. PM outputs decisions only (action + quantity per ticker)
+    2. Trade execution happens externally (in pipeline/executor)
+    3. Supports both backtest and live modes
+
+    .. deprecated:: 0.2.0
+        Use :class:`backend.agents.base.evo_agent.EvoAgent` with
+        workspace-driven configuration instead.
+    """
+    """
+    Portfolio Manager Agent - Makes investment decisions
+
     Key features:
     1. PM outputs decisions only (action + quantity per ticker)
     2. Trade execution happens externally (in pipeline/executor)
@@ -41,6 +66,13 @@ class PMAgent(ReActAgent):
         toolkit_factory_kwargs: Optional[Dict[str, Any]] = None,
         toolkit: Optional[Toolkit] = None,
     ):
+        # Emit runtime deprecation warning
+        warnings.warn(
+            "PMAgent is deprecated. Use EvoAgent via UnifiedAgentFactory instead.",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+
         object.__setattr__(self, "config", config or {})
 
         # Portfolio state