Document workshop issues and fix pyproject.toml setup failure

[Copilot]

Conducted student walk-through of workshop to identify issues. Found 11 problems ranging from critical setup failure to documentation inconsistencies.

Fixed

pyproject.toml - Added missing build-system configuration

[build-system]
requires = ["setuptools>=61.0"]
build-backend = "setuptools.build_meta"

[tool.setuptools]
py-modules = []

Without this, make setup fails immediately with setuptools package discovery error, blocking workshop start.

Documented Issues

WORKSHOP_ISSUES_REPORT.md - Comprehensive analysis (679 lines)

• 11 issues with examples, root causes, fixes
• Student experience perspective
• Priority rankings (P0/P1/P2)

ISSUES_SUMMARY.md - Quick reference (86 lines)

• Actionable checklist with time estimates
• Table format for scanning

PR_SUMMARY.md - Reviewer guide

• Investigation methodology
• How to use reports

Critical Issues Requiring Attention

P0 (Workshop blockers):

• CI references non-existent tests/ directory
• Exercise 4: Instructions use Runner.run(agent, message) but solution uses Runner.run(agent, input=inputs, run_config=config)
• Exercise 4: Missing import statements (Client, Worker, OpenAIAgentsPlugin) in instructions cause NameErrors

P1 (Student confusion):

• Conflicting Temporal setup methods (notebook vs make temporal-up)
• bootstrap.sh references non-existent make exercise-* targets
• Exercise 4 labeled "optional" in timing but presented as regular exercise

Remaining P0 fixes estimated at 70 minutes. Workshop content is solid; issues are documentation consistency and instruction/solution mismatches.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Find any issues/problems/confusions with the workshop</issue_title>
<issue_description>Your objective is to navigate the workshop as a student and find any problems or confusing portions. Then report them.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Find any issues/problems/confusions with the workshop #19

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