Improve remaining workshop events to follow SF 4-step lab pattern

[devin-ai-integration]

Summary

Restructures all remaining workshop event READMEs to follow the San Francisco workshop's 4-step lab format, reducing cognitive load and creating a consistent participant experience across all events.

Pattern applied to each lab:

1. Step 1: Get Started Fast — copy-paste prompt for Devin
2. Step 2: Level Up with AskDevin — parallel exploration while Devin works
3. Step 3: Explore with DeepWiki — architecture understanding + creative extensions
4. Step 4: Review PR and Give Feedback — PR review loop practice

Files changed:

• events/2026-03-09-oslo/README.md — removed facilitator email only (already followed SF pattern)
• events/cobol-modernization-workshop/README.md — replaced Abstract/Structure/What-to-Try format with 4-step labs; added Accelerated Variant table for different durations
• events/enterprise-demo-track/README.md — replaced "What to Demo"/"Key Talking Points" with "What to Try"/"Key Takeaways" and 4-step format
• events/platform-microservice-decomposition/README.md — consolidated 4-phase facilitator-oriented format into single deep-dive lab with 4-step format
• events/workshop-variant-2/README.md — added 4-step format to all 4 labs, removed facilitator-specific sections

Also across all files: removed facilitator email addresses from event details tables, removed "Repo Duplication Notes" and "Post-Event" checklists (facilitator-specific), standardized target outcomes format.

Review & Testing Checklist for Human

• Verify new module references exist — The cobol workshop now references MM12, MM13, MM14 (COBOL System Understanding, Migration Planning, Migration Test Harness). The platform decomposition references DA8. These are newly introduced links — confirm the corresponding files exist under modules/ or the links will be broken
• Check platform-microservice-decomposition for content loss — This was the most aggressively restructured file (went from 4 phases with detailed facilitator setup notes to 1 deep-dive lab). Verify no critical multi-repo coordination details or setup prerequisites were lost in the consolidation
• Verify copy-paste prompts (Step 1 sections) are accurate — These are the most user-facing content; check that repo names, file paths, and tool commands in each prompt match what actually exists in the corresponding repos
• Confirm no facilitator emails remain — Search all modified files for @cognition.ai or any email patterns
• Review cobol workshop's Accelerated Variant table — Newly added duration/format recommendations (4h, 3h, 2h, 1h) should be sanity-checked against actual lab content and timing

Recommended test plan: Open each modified README in a markdown previewer and click through all relative links (../../modules/...) to confirm they resolve. Spot-check 2–3 Step 1 prompts by verifying the referenced repo names and file paths exist in the org.

Notes

• Link to Devin session: https://partner-workshops.devinenterprise.com/sessions/2d1a070b161f4efbbcca26daaa77dfa9

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR. Add '(aside)' to your comment to have me ignore it.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment and CI monitoring