M2.17-D: verified SGCB/GoCB status hydration, GOOSE subscribe and scoped Data Model Read

[masarray]

M2.17-D — first presentation/integration repair based on October BCUGE screenshots

Stacked on draft #605 (exact SHA eb44abc9b2ab79db4ccc8ec69faffe9b5ead5f97), not main.

Observed: the native GOOSE Sniff workspace receives frames, but the Browser had no explicit GOOSE Subscribe action; Report TrgOps and OptFlds display as separate top-level collapsible sections rather than children of the RCB attributes; Files filename icon/text are flush to the grid cell edge.

Changes:

• Add a context-only Subscribe GOOSE button on GoCB pages, opening the existing OpenIedGooseSubscriber(device) flow. When capturing, it becomes View GOOSE Capture. No second subscriber, decoder, cache, or MMS GoEna mutation. Operator chooses a NIC through the existing safety mechanism.
• Fold TrgOps / OptFlds section entries inside the Control Block attributes expansion using existing IedBrowserDetailSectionLayout; preserve exact row identities and typed ARIEC bit interpretation.
• File List filename template now has 10px left + 5px right inset.
• Add regression tests for nesting, GOOSE CTA wiring and Files inset.

New verified-SGCB hydration increment: The prior full-discovery priority plan never saw control-block inventory. It now adds only the exact GetNameList-backed SGCB.NumOfSG, ActSG, LActTm targets through IedBrowserControlStateEvidence.ReadTargets, ahead of generic priority leaves, within the same 32-target/10-second bounded serial MMS Read. It does not infer SCL-only status, read editable fields, change the active group, or introduce a second cache/transport. Two new regression tests assert association fencing, deduplication and exclusion of edit commands.

GoCB control-state hydration: After full live discovery, the same bounded initial MMS read plan now includes exact live-inventory GoEna/NdsCom (GO) for up to four GoCBs. This is distinct from passive GOOSE frame reception. Skip stale/current observed values; deny SCL-only or duplicate inventory and every write. Critical LLN0/LPHD Mod/Beh/Health stay ahead of optional control-block reads under the 10-second total budget.

Data Model Read scope: A focused DO now shows Read DO with a separate compact Read LN action for the entire currently displayed logical node. The old ambiguous Read label could read only four attributes while leaving siblings Not read, creating a false impression of an unsuccessful full-LN scan. Both buttons call the existing cancellable MMS read code; no new transport.

Unresolved physical evidence: BCUGE screenshot shows the selected Browser GoCB LLN0.BCU while GOOSE Sniff shows GOOSE03; wire evidence cannot be borrowed across non-matching control blocks. SGCB attribute partial failures, RCB cross-client state, DataSet analog Not Exposed, and Browser Not read are not fixed by this PR; require focused protocol/evidence diagnosis, not GUI defaults or unsafe MMS retries. Avoid claiming hardware acceptance.

Engine 036e2c00d83a0815b6160147b14ea05975057965 and ArdIrec pin unchanged. Keep stacked draft / no main merge.