docs(issues): ISSUE-150 - owner's review of design requirements and Dr.Egeria gaps

[dwolfson]

Summary

Records the owner's 2026-10-13 decisions in the ISSUE-150 entry (Dr.Egeria commands for Analytic Functions). This is a docs-only change.

• The RE design session's requirements:
  1. One idempotent declaration carrying the qualifiers: accepted.
  2. Label "computed now · not recorded" vs "last recorded ": accepted.
  3. Credential tier on the declaration: kept as an informational key, not a control. Egeria never hands a step its credentials; the engine host (RE) enforces read-only from the step's manifest.
• The Dr.Egeria gaps:
  • add new commands for the other process subtypes where needed;
  • the executor link on a process step needs live testing;
  • the engine side will likely need commands.

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