Cardano Updates

This commit also proposes the new maintainers committee members as EDR-018.

Besides, in addition to the proposed process (now) outlined in the CONTRIBUTING.md, we will create the following GitHub labels to add onto tasks:

- 3 labels for indicating the value / impact:
  - **VALUE:High** – Enables milestone delivery, affects safety or correctness
  - **VALUE:Medium** – Improves reliability, performance, or developer experience
  - **VALUE:Low** – Local improvement, refactors, or quality-of-life changes

- 3 labels for indicating the delivery risk:
  - **RISK:High** – Research-heavy, unknown feasibility, may fail
  - **RISK:Medium** - Known domain but with external dependencies or rabbit holes
  - **RISK:Low** – Well-understood, mostly mechanical

- 3 labels for indicating the effort:
  - **EFFORT:High** – Multi-week / research / cross-cutting
  - **EFFORT:Medium** – 1–2 weeks
  - **EFFORT:Low** – Days

For every task we create, one label from each group will be added to help categorize and prioritize items.

Signed-off-by: KtorZ <[email protected]>

Signed-off-by: Chris Gianelloni <[email protected]>

This exposes problems with unsupported types rather than silently
causing errors downstream with a nil value

Signed-off-by: Aurora Gaffney <[email protected]>

Signed-off-by: Chris Gianelloni <[email protected]>

Signed-off-by: Chris Gianelloni <[email protected]>

Signed-off-by: Chris Gianelloni <[email protected]>