RDoc-4077 Corax: Document scoring of exists() and true

[Danielle9897]

Issue link

https://issues.ravendb.net/issue/RDoc-4077/Corax-Document-scoring-of-exists-and-true

Additional description

• Documented the RavenDB 7.2.6 Corax scoring change:
  exists() contributes 1 × query boost once per matching document, while where true contributes no score.
• Clarified the effects on scores, ordering, and performance across the related querying, boosting, and Corax articles.
• Updated all client-language variants and added the missing Java and Python articles.

---

C#
@maciejaszyk pls review the *-csharp files

Node.js
@M4xymm pls review the *-nodejs.mdx files

Python & PHP
@poissoncorp pls review the *-python.mdx & *-php.mdx files

Java
@LielNagar pls review the *-java.mdx files

---

Type of change

• Content - docs
• Content - cloud
• Content - Quill
• Content - guides
• Content - start pages/other
• New docs feature (consider updating /templates or readme)
• Bug fix
• Optimization
• Other

Changes in docs URLs

• No changes in docs URLs
• Articles are restructured, URLs will change, mapping is required (update /scripts/redirects.json file, set Documents Moved PR label)

Changes in UX/UI

• No changes in UX/UI
• Changes in UX/UI (include screenshots and description)

[poissoncorp]

The Python queries use first_name / address.location.latitude, but the RQL tabs and the other Python examples in this PR use the stored names (FirstName, Fax, ...). On Northwind this one returns 0 results. Should be FirstName / Address.Location.Latitude?

[poissoncorp]

whereExists() takes string, not ?string (DocumentQuery.php: whereExists(string $fieldName)).

Suggested change

	public function whereExists(?string $fieldName): DocumentQueryInterface;
	```
	<br/>
	<TabItem value="whereexists_1" label="whereexists_1">
	<CodeBlock language="php">
	{`public function whereExists(?string $fieldName): DocumentQueryInterface;
	`}
	</CodeBlock>
	</TabItem>
	| Parameters | Type | Description |
	| Parameter | Type | Description |
	|----------------|-----------|----------------------------------------------------|
	| **$fieldName** | `?string` | The name / path of the document field to filter by |
	public function whereExists(string $fieldName): DocumentQueryInterface;
	```
	<br/>
	| Parameter | Type | Description |
	|----------------|----------|----------------------------------------------------|
	| **$fieldName** | `string` | The name / path of the document field to filter by |

[maciejaszyk]

BTW This is Lucene only, Corax does not support indexing-time field boosting