Add a default-off overlay_publish policy for bounded exact-delta incremental runs. When enabled, eligible non-noop exact deltas publish ready overlay rows and dirty freshness without mutating canonical graph rows, while default canonical behavior remains unchanged.
Use the latest complete canonical generation as the overlay base, avoid reserving a canonical generation for successful overlay publishes, and report incremental_overlay in pipeline telemetry and benchmark parsing.
Add focused store and pipeline canaries for latest complete generation lookup, opt-in overlay visibility, canonical invisibility, dirty overlay_ready state, and absence of stray reserved canonical generations.
Signed-off-by: Andrew Hundt <ATHundt@gmail.com>
Andrew Hundt
a6fb2720f4