chore: regenerate fixture corpus from the Option B (single-flavor aggregate) publish tree

Source: cog_pipeline publish_cache built 2026-07-23T16:06:45Z at 4f992a0
(pipeline PR #43, issue #28 Option B ruling: legacy aggregate families now
publish only the H2-designated Direct flavor; Census Total = code + M-code).

Fixture delta, verified against the prior partition: year=2011 loses
173,394 non-designated aggregate rows (3,037,606 -> 2,864,212; -05 max
rows/gov 2 -> 1), leaf rows byte-identical; 2012/2019/2020 partitions,
metadata parquets, and docs unchanged. manifest.json resyncs sha256 /
row_count / size_bytes for the changed partition.

Full suite vs the regenerated fixture: 467 PASS / 0 FAIL / 0 WARN / 0 SKIP
— zero pin adjudications needed (reader verbs filter is_aggregate rows and
no main test pins legacy aggregate counts).

inst/extdata/fixture_corpus/manifest.json

@@ -1,7 +1,7 @@
 {
   "schema_version": 6,
-  "built_at": "2026-07-22T17:12:32Z",
+  "built_at": "2026-07-23T16:14:30Z",
-  "pipeline_commit": "62bc1b6",
+  "pipeline_commit": "4f992a0",
   "fixture_note": "Four-year (2011, 2012, 2019, 2020) fixture for uscogdata tests. Full corpus available via USCOGDATA_URL. Regenerated for Phase R2 (schema_version 5, harmonization_map/harmonization_recipes/ series_breaks parquet tables added). 2011/2012 straddle the wide-aggregate -> modern-leaf format boundary exercised by basis= \"harmonized\" and recipe= queries; 2019/2020 retain the prior per-capita/CPI regression anchors. Full canonical_fips_xwalk master and canonical_alias lookup table included via data-raw/regenerate_fixture_corpus.R.",
   "data_vintage": {
     "source_vintages": {
@@ -36,9 +36,9 @@
       {
         "year": 2011,
         "path": "data/long/year=2011/part-0.parquet",
-        "sha256": "485a1639bfe2aec90fbbb596e410f18c5881b3f496ba6b0a9f742525c3c1f0af",
+        "sha256": "84302ab364dc9fc3b3fbbc3c3f8b826e3508b4d73ff7c42d094d3863cd1e37b5",
-        "row_count": 3037606,
+        "row_count": 2864212,
-        "size_bytes": 4650038
+        "size_bytes": 3845911
       },
       {
         "year": 2012,