Add 08-09 REST invocation and 08-10 hosted Copilot SDK agent labs

[corticalstack]

What

Two new 08-agents labs, plus cleanup of an accidentally-committed upstream dump.

08-09-invoke-agent-via-rest

Three notebooks invoking a Foundry agent over raw REST (the responses API), covering the patterns we previously only had via the SDK:

• 08-09-01 single-shot
• 08-09-02 multi-turn
• 08-09-03 streaming

08-10-hosted-copilot-sdk-agent

Deploys a GitHub Copilot SDK agent as a Foundry hosted agent:

• Bicep (az deployment sub create) -> az acr build -> AIProjectClient.agents.create_version, with a two-pass register + bootstrap-delete.
• BYOK Foundry model via Managed Identity over the project endpoint (<project>/openai/v1/, audience ai.azure.com).
• M365 license-analytics demo: uploaded CSV + reference JSON, five analytics prompts (rendered as markdown tables), and an agent-generated, downloadable cost-by-department chart (matplotlib with an SVG fallback, retrieved via a new download_session_file() helper).
• OTel tracing into the Foundry portal, and 08-10-00 docs covering the agentic loop, BYOK wiring, and the permission model.

Cleanup

• Removes the accidentally-committed upstream .git directory and azd scaffolding from the old 08-agents/08-09 path.
• pyproject: bumps azure-ai-projects, drops the unused azure-ai-inference from the finetune dependency group.

Notes

• All notebook outputs are cleared; no subscription/tenant/principal IDs, keys, or resource names are committed. The runtime bicep params file is git-ignored.
• Notebooks are authored but validated against a torn-down deployment; the file-download round-trip in Step 7.8 has an inline-SVG fallback for platform builds that do not serve agent-written files.