Adds a rotating, non-overlapping-batch ReconciliationScheduler (common/,
loader-agnostic) and wires it into the 1.12.2 leaf: a new tick timer
(reconciliationIntervalTicks, mirroring the existing delta-flush timer)
periodically re-reads and resends a bounded slice of currently-loaded
chunks, catching mutations that never fire a block event (world-gen,
other mods writing blocks directly, /fill, etc.).
ChunkAdapter gains loadedChunkKeys(); Forge1122ChunkAdapter implements it
via ChunkProviderServer.getLoadedChunks(). MapperConfig gains
reconciliationChunksPerSweep to bound sweep cost.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015tKdPZt78zbPUZMXWzKEKt
octoturge
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