Retroactive design + plan documentation for Phase B.3 (deferred
analysers requiring custom Analyser subclasses for cross-entry and
threshold logic). Records the architectural shift away from vanilla
PatternAnalyser, the threshold constant rationale (event-pairing /
sliding-window / consecutive-snapshot deltas), and the synthetic
fixture extensions that exercise both trigger and non-trigger paths.
Plan is as-built with checkboxes pre-checked and SHAs referenced.
Retroactive design + plan documentation for Phase B.2 (PvP combat
detection plus six admin verb-dispatch insight classes), reconstructed
from chat history and git log. Mirrors the shape of the existing
Phase B.1 docs. Plan is as-built with checkboxes pre-checked and
commit SHAs referenced inline; Deviations section captures the
90c85a0 brace-fix interlude.
