Create the SPI income channel on the microcosm spine with the FRS-only second stage

changelog.d/683-uk-spi-spine-channel.added.md

@@ -0,0 +1 @@
+Create the SPI income channel on the raw UK spine (#683): three new manifest stages (`frs_hmrc_spine_leaves`, `spi_support_channel`, `hmrc_spi_income_spine`) stack 10,000 zero-weight SPI-synthetic households at the pre-clone grain, run the SPI stage-1 and FRS-only stage-2 QRFs, re-impute base-channel dividends, and emit the 208-fact HMRC replay sidecar from the spine driver — with four new generic operation kinds including the first row-appending manifest primitive (`stack_zero_weight_donors`). The certified-H5 path and the frozen HMRC manifest are unchanged.

packages/microcosm-build/src/microcosm/build/source_manifest.py

@@ -49,6 +49,7 @@
         "assign_clipped_normal",
         "assign_uniform_draw",
         "aggregate_person_to_benunit",
+        "allocate_zero_weight_prior_mass",
         "annualize_periodic_amounts",
         "assemble_group_entities",
         "attribute_self_employed_health_premiums",
@@ -94,6 +95,7 @@
         "fit_weighted_qrf_stage2",
         "fold_into",
         "gate_distributional_effective_mass",
+        "gate_zero_weight_strata",
         "head_carry",
         "join",
         "impute_retirement_contributions_to_puf_support",
@@ -115,11 +117,13 @@
         "read_table",
         "read_tables",
         "read_acs_rent_donor",
+        "redraw_columns_from_fitted_qrf",
         "replace_zero_weight_spi_support",
         "retain_adjudicated_frs_hmrc_leaves",
         "sample_categorical_from_count_table",
         "replace_sentinels",
         "split_component_by_share",
+        "stack_zero_weight_donors",
         "strict_read_private_table",
         "support_clip",
         "uprate",