[runtime] StoryboardElementStateCondition storyboardElementType="action" is permanently false (§7.6.5.2)

[JArmandoAnaya]

What

StoryboardElementStateCondition with storyboardElementType="action" is permanently unsupported: core/src/engine.cpp:485-491 warns "not supported yet; condition is always false" and core/src/runtime/scheduler.cpp:791-795 returns nullptr for action references because per-action scheduler nodes were never built. Both sites blame p5-s4 (#32), which closed without them. The coverage matrix row says "unsupported until p5-s4 (warns)" — a dead owner — and the gap is not in the roadmap's post-v0.0.1 list. A whole enumerator of the condition's type attribute is silently dead (ASAM OpenSCENARIO XML 1.4 §7.6.5.2).

Done when

• Per-action nodes become observable in the scheduler (states + transitions, consistent with the §8.1-8.2 state machine) and the condition evaluates against them — or the limitation is deliberately kept, re-scoped to Post-v0.0.1 with this issue as the matrix-row owner and a post-list entry
• The warning text stops citing p5-s4 either way