[PROD-006] .NET source discovery download and parsing orchestration

[ktalpay]

Task ID: PROD-006
Lane: dotnet
Status: merged
Agent: dotnet-agent
Depends on: PROD-005

Goal:
Add .NET source discovery/download/parsing orchestration for production parity without implementing database inserts.

Scope:

• Use .NET config and year-state baselines.
• Select source families and target year per family.
• Support GHG Protocol, DEFRA/DESNZ, and IPCC EFDB orchestration.
• Discover or load configured artifacts.
• Return no_available_source_year when target year is unavailable.
• Execute existing .NET parser boundaries to produce normalized output where available.
• Produce deterministic per-source run summary.
• Keep run-once fail-closed until persistence insert parity is implemented.

Non-goals:

• No source-specific master/detail insert runtime.
• No final production-ready claim.
• No Python runtime changes.
• No production credentials.
• No uncontrolled live network calls by default.

Acceptance:

• Orchestration covers all three source families.
• Target year behavior uses year-state contract.
• unavailable year is safe no-op.
• Parser handoff/output is testable.
• No DB inserts.
• No generated artifacts.

Task-ID: PROD-006

[github-actions]

Agent Task Watcher updated task status.

Detected task: PROD-006
Merged PR: #624
Task issue status: status:missing -> status:merged

Downstream task update summary:

No dependent tasks were declared in Unblocks:.