refactor(db): normalize asn prefix cache and ttl cleanup

Строки asn_prefix_cache_row; периодический prune через evobgp-ingest.

Co-authored-by: Cursor <[email protected]>

migrations/postgres/000020_asn_cache_rows.down.sql

@@ -0,0 +1,10 @@
+ALTER TABLE asn_prefix_cache ADD COLUMN prefixes_json JSONB NOT NULL DEFAULT '[]';
+
+UPDATE asn_prefix_cache apc
+SET prefixes_json = COALESCE((
+    SELECT jsonb_agg(apcr.prefix::text ORDER BY apcr.prefix::text)
+    FROM asn_prefix_cache_row apcr
+    WHERE apcr.asn = apc.asn
+), '[]'::jsonb);
+
+DROP TABLE IF EXISTS asn_prefix_cache_row;

migrations/postgres/000020_asn_cache_rows.up.sql

@@ -0,0 +1,14 @@
+CREATE TABLE asn_prefix_cache_row (
+    asn     BIGINT NOT NULL REFERENCES asn_prefix_cache (asn) ON DELETE CASCADE,
+    prefix  CIDR NOT NULL,
+    PRIMARY KEY (asn, prefix)
+);
+
+INSERT INTO asn_prefix_cache_row (asn, prefix)
+SELECT apc.asn, t.elem::cidr
+FROM asn_prefix_cache apc
+CROSS JOIN LATERAL jsonb_array_elements_text(apc.prefixes_json) AS t(elem)
+WHERE jsonb_typeof(apc.prefixes_json) = 'array'
+  AND jsonb_array_length(apc.prefixes_json) > 0;
+
+ALTER TABLE asn_prefix_cache DROP COLUMN prefixes_json;

migrations/sqlite/000020_asn_cache_rows.down.sql

@@ -0,0 +1,2 @@
+ALTER TABLE asn_prefix_cache ADD COLUMN prefixes_json TEXT NOT NULL DEFAULT '[]';
+DROP TABLE IF EXISTS asn_prefix_cache_row;

migrations/sqlite/000020_asn_cache_rows.up.sql

@@ -0,0 +1,7 @@
+CREATE TABLE asn_prefix_cache_row (
+    asn     INTEGER NOT NULL REFERENCES asn_prefix_cache (asn) ON DELETE CASCADE,
+    prefix  TEXT NOT NULL,
+    PRIMARY KEY (asn, prefix)
+);
+
+ALTER TABLE asn_prefix_cache DROP COLUMN prefixes_json;