feat: update algolia-search plugin

[kumfo]

update algolia search client SDK(algoliasearch-client-go): V3 -> V4

[Copilot]

Pull Request Overview

This PR updates the Algolia search plugin by migrating from the v3 to v4 version of the algoliasearch-client-go SDK. The migration involves significant API changes requiring adaptations to method calls, data structures, and initialization patterns.

• Updates the Algolia search client SDK from v3 to v4
• Refactors all search and indexing operations to use the new v4 API patterns
• Adds proper JSON marshalling/unmarshalling for data transformation

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 6 comments.

File	Description
go.mod	Updates dependency from algoliasearch-client-go/v3 to v4 and related version bumps
algolia.go	Major refactoring of client initialization, search methods, and CRUD operations for v4 API compatibility
initsearch.go	Updates settings initialization and virtual replica configuration to use v4 API patterns
sync.go	Refactors batch update operations with JSON marshalling for v4 compatibility

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[Copilot]

The type is being hardcoded to 'question' instead of using the actual type from the hit. This will cause incorrect type classification for non-question content like answers.

[Copilot]

The type is being hardcoded to 'question' instead of using the actual type from the hit. This will cause incorrect type classification for answer content.

Suggested change

	Type: "question",
	Type: hit.Type,

[Copilot]

The type is being hardcoded to 'question' in the SearchAnswers method, but this should reflect the actual content type from the search results.

[Copilot]

This marshal-unmarshal pattern is inefficient. Consider using a more direct type conversion or reflection to convert []*plugin.SearchContent to []map[string]any without the JSON roundtrip.

Suggested change

	jsonRecords, err := json.Marshal(contents)
	if err != nil {
	return
	}
	err = res.Wait()
	err = json.Unmarshal(jsonRecords, &records)
	if err != nil {
	return
	}
	for _, content := range contents {
	var m map[string]any
	b, err := json.Marshal(content)
	if err != nil {
	return err
	}
	if err := json.Unmarshal(b, &m); err != nil {
	return err
	}
	records = append(records, m)
	}

[Copilot]

This marshal-unmarshal pattern is inefficient. Consider using a more direct type conversion to convert *plugin.SearchContent to map[string]any without the JSON roundtrip.

[Copilot]

Missing error check after the SearchSingleIndex call. The code should verify that err is nil before proceeding to iterate over hits.

Suggested change

	)
	)
	if err != nil {
	return nil, 0, err
	}