ITP Data Flows S2: make teamwork workshop standalone with job board scenario

[omkarv]

The Sprint 2 teamwork workshop had a broken cross-sprint dependency. Exercise 2 referenced "the product your team defined in the previous week", but Sprint 1 never defines a product. This PR makes the session fully standalone and sharpens the product/BA framing that is the focus of this sprint.

Full context in this Slack thread:
https://codeyourfutur-yov6609.slack.com/archives/C07U0V5A51R/p1776165328432989

Note on scenario choice: The original workshop used the library project, which ties to the Book Library coding exercise trainees do in Sprint 2. This PR switches to a job board scenario to reduce overlap with the Sprint 3 workshop which also uses the library. Happy to revert to the library if the team prefers continuity, the structural improvements (standalone framing, timings, prioritisation focus, wrap-up) apply either way.

1. Fix cross-sprint dependency

Replaced "the product your team defined in the previous week" with an explicit scenario: a job board for people looking for their first role in tech. The scenario is intentionally different from the library website used in Sprint 3 so each session feels distinct.

2. Reframe the introduction around the product/BA lens

The original intro ("we move from theoretical concepts to defining the core of your specific project") implied prior context. The new intro sets the scene: before any code is written, product managers and business analysts work with stakeholders to understand what to build and why.

3. Richer user definition in Exercise 2

Updated the discussion prompts to reflect the job board scenario with more varied user types (first-time jobseeker, recruiter, hiring manager). Added two questions that push into BA thinking: "How might those needs conflict?" and "Which users matter most for your MVP?"

4. Add prioritisation to Exercise 3

Added a step asking teams to pick their top three MVP features and defend the choice. Gives the peer review something more concrete to push back on, and mirrors real product decision-making.

5. Add a break and a wrap-up tab

Added a 15-minute break after Exercise 2, and a wrap-up tab with volunteer discussion prompts focused on product/BA practice (user research, stakeholder disagreements, roadmap decisions).

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[illicitonion]

LGTM, thank you so much!

It looks like this contains #1842 as well? Happy to merge either or both! Just one comment - let me know what you think :)

[omkarv]

Updated the PR with latest mainline commits and addressed comments

[illicitonion]

Thanks so much!