(#93) Update to Elasticsearch 8#97

Draft

blairlearn wants to merge 30 commits intodevelopfrom

Commits on Dec 11, 2025

Commits on Dec 12, 2025

Commits on Dec 15, 2025

Revert wildly incorrect change to ElasticsearchInterceptingConnection.
blairlearn
committed

Commits on Dec 18, 2025

Commits on Dec 19, 2025

Bring back CustomJsonConverter.cs. Why was this deleted?
blairlearn
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Complete Elasticsearch v8 and System.Text.Json migration
blairlearn
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Add X-Elastic-Product header to mock Elasticsearch clients
blairlearn
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Use lowercase x-elastic-product header for ES client compatibility
blairlearn
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Remove comments from test-response.json for System.Text.Json compatibility
blairlearn
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Use JsonNode.DeepEquals for JSON structure comparison in tests
blairlearn
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Update integration tests to use ES 8.
blairlearn
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Update Custom serialization test to deserialize the entire class rather than a single property.
blairlearn
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Commits on Dec 23, 2025

Commits on Jan 6, 2026