Document quest_start, quest_step_complete, quest_complete, and quest_accept_denied
anchors for future E9.M1 ingest with README, manual QA, and module doc updates.
Add QuestObjectiveWiring with auto step advance/complete, hook into
GatherOperations, CraftOperations, EncounterCompletionOperations, and
QuestStateOperations accept/advance for inventory_has_item checks.
Add CanWritePlayer to IPlayerQuestStateStore and check before
prerequisite gate; map TryActivate/TryAdvanceStep store failures
from progress snapshots instead of always unknown_player.
Align test DI resolution with encounter pattern, add unknown_quest
advance/complete tests, catalog quest id constants, refactor
TryMarkComplete readability, and update decomposition docs.
VinPropane