Voyager 3 schema: the slim catalog (migration 6000, the reset) and blocks (6100)

releases rebuilt without its text copies: poster_id, group_set_id,
bytea keys, source smallint, edge, settled_at as the finish. posters by
id, group_sets. blocks as the lease unit, ranges.block_id. fragments,
range_blocks, release_final, the settler and the fragment merger gone;
release_chunks, rule_counts and rule_samples keyed by block. Cold tables
on CHUNK_TABLESPACE. Migration 6000 truncates the catalog and refuses
without VOYAGER3_RESET=1.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

tests/unit/release/source.spec.ts

@@ -0,0 +1,19 @@
+import { test } from '@japa/runner'
+import { SOURCES, sourceCode, sourceName } from '#lib/release/source'
+
+test.group('release source codes', () => {
+  test('names and codes map both ways; the codes are fixed', ({ assert }) => {
+    assert.deepEqual(SOURCES, { subject: 1, post: 2, stem: 3, spot: 4, nzb: 5, album: 6 })
+    for (const [name, code] of Object.entries(SOURCES)) {
+      assert.equal(sourceCode(name), code)
+      assert.equal(sourceName(code), name)
+      assert.equal(sourceName(String(code)), name)
+    }
+  })
+
+  test('an unknown name throws, an unknown code reads as unknown', ({ assert }) => {
+    assert.throws(() => sourceCode('subjekt'), /Unknown release source/)
+    assert.equal(sourceName(99), 'unknown')
+    assert.equal(sourceName(null), 'unknown')
+  })
+})