[stormer78]

Follow-up to #34 / #49: the evaluation now scores room recall as well as personal memory.

Harness

• Probes now use the same path as memory_recall: rooms::recall over personal memory and the scenario's rooms. A new optional sources field on a probe narrows where it looks. Room results are named room:<label>/<key> in every probe list.
• New room step: writes a sealed room record signed by a named member. It can also write:
  • an open (unsigned) record;
  • a deprecated, retracted or expired record;
  • a deliberately broken record: alter (changed after signing), servedAs (moved to another key), or hostAuthor (the host records a different author).
• New sources dimension. tests/eval/README.md documents the step and the field.

Scenarios (19–22)

scenario	checks
sources-room-and-personal	One ranking across both: an observed room record outranks an inferred memory. sources narrows to personal only or to one room. A memory type leaves rooms out.
sources-room-poisoning	Altered, relocated and wrong-author room records are absent and reported refused, with a query and with none, and the fence holds.
sources-room-standing	Deprecated records rank lower; retracted and expired records never appear, with a query and with none.
sources-room-abstention	An unrelated query returns nothing even with rooms configured. An open room's record is recalled.

Numbers

	before	after
existing six dimensions	unchanged	unchanged
sources	—	10/10 checks, precision 100%, MRR 1.00
all	29/29, precision 82%	39/39, precision 86%

Switching probes to the unified recall path moved no existing metric.

Mutation check: disabling room signature verification fails sources-room-poisoning (8/10, five hard failures), so the scenario guards the check it claims to.

Tests only, so no version bump (as with #35).