Task: Build the rates delta and gamma ladders

A party runs a rates delta ladder and a rates gamma ladder over a book and reads them bucketed by curve and tenor.

• The report definition, its risk report configuration and its analytics are seeded for a named party.
• A run produces a ladder row for each curve and tenor the configuration shifts, and no row for a factor the run does not hold.
• The gamma ladder reads the ComputeGamma figure and states in its documentation that it is money, not a curvature per unit.
• The stored figures carry the curve, the tenor and the shift size, so a reader can tell a .1 figure from a basis-point figure without consulting the run.

(Implementation strategy. Written when work starts; key decisions are distilled into the parent story's * Decisions at close, but the plan itself stays — it is the historical record of what we did.)

Every number this task claims about a tree, with the command that produced it and the commit it was measured at. A number without both is not a measurement, because a clean-up record describes a tree and trunk moves under a branch: a consumer count, a gate's component count and a suite's size all change with no code changing, and the reader of a bare number cannot tell which tree it came from. Where the raw output matters, put it in an evidence/ file beside the task and name that file in the Command column.

Manual QA scenarios (scaffolded via compass add test_scenario) that verify this task. Link new ones here as they're created; the scenario doc itself links back via its "Verifies task" field.

• Greek ladder reports — the design this task builds.