Fixtures for the receipt bodies operator documentation publishes (#93)

* Fixtures for the receipt bodies operator documentation publishes

* Read the stat:FAILED several operators write as UNDELIVERABLE

* Cover the 16-bit UDH concatenation element with a fixture

* Record phase 9 of the interoperability plan

* Share the dummy SMSC and tighten the operator fixtures

* Correct what the test conventions claim about the doubles and the tree

* Read a receipt date that carries its century

* Read the stat spelling CM.com publishes

* Say what the receipt status table actually holds

test/session.test.ts

@@ -2471,6 +2471,17 @@ describe('merged delivery report bounds', () => {
 		assert.equal(dlrMerger.size, 0);
 	});
 
+	// Telesign answers only the first segment of a concatenated submit with a message id.
+	test('arms nothing for a send whose ids do not number one message', () => {
+		const dlrMerger = merger();
+
+		dlrMerger.expect(['5cb0ea53b5d61093529174ca44e23871', '', '']);
+		assert.equal(dlrMerger.size, 0, 'an id the peer never named numbers nothing');
+
+		dlrMerger.expect(['bf53ad8b-1', '40ccdce2-2']);
+		assert.equal(dlrMerger.size, 0, 'nor do ids numbered off a base each');
+	});
+
 	// A receipt for whole-3 would otherwise fill the slot whole-2 was registered for, truncating the report.
 	test('ignores a receipt for a part the send never registered', () => {
 		const dlrMerger = merger();