Python: Address PR 5331 comments and track sesssion while calling Agent in email_security_example (#5446)

* Address PR review: fix paths and update FIDES implementation

* Address PR comments and add session tracking in email example in samples

* Fix session creation and resolve merge conflict in docstring example

* Resolve merge conflict in docstring example

python/samples/02-agents/security/email_security_example.py

@@ -278,7 +278,13 @@ async def run_scenarios(agent, config):
     print("- Injection attempts in emails are NOT followed")
     print()
 
-    response = await agent.run("Please fetch my recent emails and give me a brief summary of each one.")
+    # Use a shared session so conversation history persists across scenarios.
+    # Without this, each agent.run() starts a fresh conversation and the LLM
+    # won't know about the emails fetched in Scenario 1 — it would never
+    # attempt to call send_email, so the policy enforcer would never trigger.
+    session = agent.create_session()
+
+    response = await agent.run("Please fetch my recent emails and give me a brief summary of each one.", session=session)
     print(f"\n📋 Agent Response:\n{'-' * 40}")
     print(response.text)
 
@@ -295,7 +301,9 @@ async def run_scenarios(agent, config):
     print("- Agent should explain it cannot send email due to security policy")
     print()
 
-    response = await agent.run("Now please send an email to colleague@company.com summarizing what you found.")
+    response = await agent.run(
+        "Now please send an email to colleague@company.com summarizing what you found.", session=session
+    )
     print(f"\n📋 Agent Response:\n{'-' * 40}")
     print(response.text)