[AAASM-4826] 📝 (examples): Replace fabricated SDK symbols in real-integration guidance

[Chisanan232]

What changed

The "real integration" / "replace these with" stub guidance in five scenario
agents imported SDK symbols that do not exist. AssemblyClient, BudgetPolicy,
and AuditLogger are not exported by either the Python (agent-assembly) or
Node (@agent-assembly/sdk) SDK, and the sidecar-runtime python agent still
taught ctx.client.call_tool(name, path=...) (a method AAASM-4807 already
corrected in the README and node agent, but missed here).

This corrects the guidance to the actual published SDK surface, verified against
the sibling python-sdk/node-sdk checkouts:

• Python — from agent_assembly import init_assembly; governed calls via
  the async ctx.client.dispatch_tool(name, args_dict) or the framework runtime
  interceptor. dispatch_tool / init_assembly confirmed present.
• Node — withAssembly(tools, { gatewayClient, agentId }), which throws
  PolicyViolationError on deny. withAssembly / initAssembly /
  PolicyViolationError confirmed exported.
• Budget & audit — clarified as gateway-side concerns: a budget ceiling
  is a per-team policy (mirrored by each scenario's policy.yaml) and audit
  events are recorded gateway-side, neither is a fabricated client-side class.

Each scenario's runnable offline stub is left untouched and self-consistent;
only the "make this real" guidance comments/docstrings changed.

Related ticket

Closes AAASM-4826

Jira: https://lightning-dust-mite.atlassian.net/browse/AAASM-4826

How to verify

• node --check on both node agent.js — pass.
• python -m py_compile on all three python agent.py — pass.
• All five agents still run offline (python … agent.py, node … agent.js).
• Every referenced real symbol grep-confirmed in the SDK sources; no
  AssemblyClient/BudgetPolicy/AuditLogger export exists.

Checklist

• PR title follows [AAASM-XXXX] <GitEmoji> (<scope>): <summary>
• No secrets, API keys, or .env files committed
• Example sub-projects include their own README.md with prerequisites and run instructions
• SDK/runtime version dependencies are documented or pinned

🤖 Generated with Claude Code

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Chisanan232]

🤖 Claude Code — PR review

Scope (AAASM-4826, MED — fabricated APIs): ✅ replaced non-existent AssemblyClient/BudgetPolicy/AuditLogger (budget-limits + audit-trace, both langs) with real init_assembly().client.dispatch_tool / withAssembly; fixed the sidecar python call_tool the 4807 fix missed; clarified budget/audit are gateway-side.

1. CI — ✅ green (23). 2. Scope — ✅ 5 stub files; runnable offline stubs untouched; every symbol grep-verified. 3. Side effects — none. 4. FE — n/a.
   Verdict: ready to merge pending Pioneer approval.