Fix broken anchor fragments in settings and function links

[Blargian]

Summary

A broken-link sweep of the upcoming Mintlify-rendered docs surfaced ~30 link fragments that point at anchors that never existed on the target heading. All of them are author typos in source content (verified against each target heading's explicit {#id} ID); none are caused by Docusaurus → Mintlify slugifier divergence.

Three patterns are involved:

• Docusaurus-namespaced prefixes that were never valid IDs. Links use #server_configuration_parameters-user_files_path, #server_configuration_parameters-logger, #server_configuration_parameters-openssl, #server_configuration_parameters-query-log, and #settings-max_threads / #settings-max_insert_block_size. The corresponding target headings are plain ## user_files_path {#user_files_path}, ## logger {#logger}, ## openSSL {#openssl}, ## query_log {#query_log}, ## max_threads {#max_threads}, ## max_insert_block_size {#max_insert_block_size}.
• Hyphens where the setting ID uses underscores. Links use #parts-to-delay-insert, #parts-to-throw-insert, #min-insert-block-size-rows, #min-insert-block-size-bytes, #max-thread-pool-size. The actual heading IDs are underscore form (#parts_to_delay_insert, etc.).
• Wrong case on function-name anchors. #cityhash64 → #cityHash64; the malformed #arraymapfunc-arr1- → #arrayMap.

Files changed

• docs/guides/best-practices/sparse-primary-indexes.md
• docs/guides/sre/tls/configuring-tls.md
• docs/integrations/language-clients/rust.md
• knowledgebase/Insert_select_settings_tuning.mdx
• knowledgebase/async_vs_optimize_read_in_order.mdx
• knowledgebase/compare_resultsets.mdx
• knowledgebase/finding_expensive_queries_by_memory_usage.mdx
• knowledgebase/how-to-increase-thread-pool-size.mdx
• knowledgebase/importing-geojason-with-nested-object-array.mdx

Test plan

• Each rewritten anchor matches an {#id} on the linked target page (verified by grep against docs/operations/settings/*.md, docs/operations/server-configuration-parameters/settings.md, docs/sql-reference/functions/hash-functions.md, docs/sql-reference/functions/array-functions.md).
• No other instances of these typo patterns remain in docs/ or knowledgebase/ (broad grep, see commit message).

🤖 Generated with Claude Code

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Note

Low Risk
Documentation-only link fragment fixes with no runtime or configuration behavior changes.

Overview
This PR fixes broken in-page link anchors across guides, integrations, and knowledge base articles so they match the real {#id} values on target docs (for Mintlify and post-migration link checks).

Anchor corrections fall into three patterns: removing obsolete Docusaurus-style prefixes (e.g. #server_configuration_parameters-user_files_path → #user_files_path, #settings-max_threads → #max_threads); using underscores where settings IDs use them (e.g. #parts-to-delay-insert → #parts_to_delay_insert); and fixing function anchor casing (e.g. #cityhash64 → #cityHash64, malformed #arraymapfunc-arr1- → #arrayMap).

Touched paths include the sparse primary index guide, TLS configuration guide, Rust client docs, and several knowledge base articles (insert/select tuning, async read, result-set comparison, query log, thread pool, GeoJSON import).

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