Order transaction smart contract results and operations by execution

[stefangutica]

Reasoning

• Smart contract results did not expose timestampMs.
• SCRs sharing a timestamp were ordered by uuid, which does not reflect execution.
• operations came out in arbitrary order: events were not sorted by order, SCR operations were always placed before log operations, and trimOperations moved the sender's operations to the top.
• The logs index is deprecated and removed.

Proposed Changes

• Added timestampMs to SmartContractResult. When it is missing, it falls back to timestamp * 1000. Added nonce as a sort tie-breaker for SCRs.
• Added the features.chainSupernova config (enabled, activationTimestampMs) and the scResultsOrderedByExecution query param on GET /transactions/:txHash, default false.
• When the param is set, SCRs are sorted by their creation order on the source shard, using executionOrderTxsIndices. The indices are read from blocks before Supernova and from executionresults after.
• Log events are read only from events, sorted by order in elastic.
• Operations follow the order of the transaction and its SCRs. Removed the sender-first sort from trimOperations; deduplication is unchanged.
• Removed the logs index path and elasticMigratedIndices.
• Chain simulator e2e now uses a standalone multiversx/elastic-indexer container, so the executionresults index exists.

How to test

• GET /transactions/2be7d7e40df1c7eb84c7dc2103669fce0b4639d92789c18c926f8d31fc4a5b3b?scResultsOrderedByExecution=true (post-Supernova): results and operations follow the swap flow, with cross-shard fee SCRs between the swaps.
• GET /transactions/0e21b0d3dd439689a9c254168ce613aaa7acd424f4e0b8fcb4628fac99235c1d?scResultsOrderedByExecution=true (pre-Supernova): results follow the execution indices from blocks.
• GET /transactions/ea9c62431d0eb7aecbf41467980c9ac086d645510e3e9714d3d3ff811b49926f: the sender's writeLog is the last operation.
• Without the param, no extra elastic requests are made.

[github-actions]

k6 load testing comparison.
Base Commit Hash: 8d8cb88
Target Commit Hash: 36dee95

Metric	Base				Target				Diff
	Avg	Max	90	95	Avg	Max	90	95	Avg	Max	90	95
Mex	63.58	1245.55	109.74	221.71	40.36	1603.10	54.49	58.49	-36.52% ✅	+28.71% 🔴	-50.34% ✅	-73.62% ✅
Transactions	218.53	37153.27	118.94	139.43	74.28	15470.51	66.12	96.11	-66.01% ✅	-58.36% ✅	-44.41% ✅	-31.07% ✅
Accounts	62.81	702.86	109.01	221.56	42.71	709.20	57.76	70.97	-32.00% ✅	+0.90% 🔴	-47.01% ✅	-67.97% ✅
Blocks	86.05	853.46	217.33	308.25	51.17	2726.91	57.30	64.00	-40.54% ✅	+219.51% 🔴	-73.63% ✅	-79.24% ✅
Nodes	3963.45	38690.93	14989.17	38688.79	66.59	15858.88	58.49	74.03	-98.32% ✅	-59.01% ✅	-99.61% ✅	-99.81% ✅
Tokens	276.18	1566.04	710.19	1564.69	40.72	2663.78	53.68	58.10	-85.26% ✅	+70.10% 🔴	-92.44% ✅	-96.29% ✅
Pool	63.76	1477.21	113.05	222.72	40.63	2640.55	53.65	57.96	-36.28% ✅	+78.75% 🔴	-52.55% ✅	-73.98% ✅
Test Run Duration	60002.58				60005.90

Legend: Avg - Average Response Time, Max - Maximum Response Time, 90 - 90th Percentile, 95 - 95th Percentile
All times are in milliseconds.