feat(doctrine): deprecate the extends-AbstractFilter form of Date/Range/Exists filters

DateFilter, RangeFilter and ExistsFilter (ORM + ODM) still extend the
AbstractFilter base deprecated in 4.4. Unlike the doomed legacy filters,
these three survive: in 5.0 they are rewritten standalone (Date/Range as
overlays over ComparisonFilter, Exists reading its value from the
QueryParameter) — same class name, same URL syntax, drop-in.

Add an @deprecated note on the legacy extends-AbstractFilter form so users
migrate their declarations to QueryParameter ahead of the 5.0 rewrite. The
classes themselves are not removed. PHPDoc-only, no runtime trigger.

Author: soyuka

src/Doctrine/Odm/Filter/DateFilter.php

@@ -120,6 +120,8 @@
  * @author Kévin Dunglas <dunglas@gmail.com>
  * @author Théo FIDRY <theo.fidry@gmail.com>
  * @author Alan Poulain <contact@alanpoulain.eu>
+ *
+ * @deprecated since API Platform 4.4: extending {@see AbstractFilter} is deprecated. In 5.0 this filter is rewritten as a standalone overlay over {@see ComparisonFilter} (translating the `[before]`/`[strictly_before]`/`[after]`/`[strictly_after]` syntax) — same class name, same URL syntax, drop-in. Declare it through a QueryParameter to migrate.
  */
 final class DateFilter extends AbstractFilter implements DateFilterInterface, JsonSchemaFilterInterface, OpenApiParameterFilterInterface
 {

src/Doctrine/Odm/Filter/ExistsFilter.php

@@ -110,6 +110,8 @@
  *
  * @author Teoh Han Hui <teohhanhui@gmail.com>
  * @author Alan Poulain <contact@alanpoulain.eu>
+ *
+ * @deprecated since API Platform 4.4: extending {@see AbstractFilter} is deprecated. In 5.0 this filter is rewritten as a standalone filter (reading its value from the QueryParameter instead of the legacy `context['filters']` lookup) — same class name, same URL syntax, drop-in. Declare it through a QueryParameter to migrate.
  */
 final class ExistsFilter extends AbstractFilter implements ExistsFilterInterface, JsonSchemaFilterInterface, OpenApiParameterFilterInterface
 {

src/Doctrine/Odm/Filter/RangeFilter.php

@@ -107,6 +107,8 @@
  *
  * @author Lee Siong Chan <ahlee2326@me.com>
  * @author Alan Poulain <contact@alanpoulain.eu>
+ *
+ * @deprecated since API Platform 4.4: extending {@see AbstractFilter} is deprecated. In 5.0 this filter is rewritten as a standalone overlay over {@see ComparisonFilter} (translating `[between]=X..Y` to `[gte]=X` + `[lte]=Y`, passing through `[gt]`/`[gte]`/`[lt]`/`[lte]`) — same class name, same URL syntax, drop-in. Declare it through a QueryParameter to migrate.
  */
 final class RangeFilter extends AbstractFilter implements RangeFilterInterface, OpenApiParameterFilterInterface
 {

src/Doctrine/Orm/Filter/DateFilter.php

@@ -124,6 +124,8 @@
  *
  * @author Kévin Dunglas <dunglas@gmail.com>
  * @author Théo FIDRY <theo.fidry@gmail.com>
+ *
+ * @deprecated since API Platform 4.4: extending {@see AbstractFilter} is deprecated. In 5.0 this filter is rewritten as a standalone overlay over {@see ComparisonFilter} (translating the `[before]`/`[strictly_before]`/`[after]`/`[strictly_after]` syntax) — same class name, same URL syntax, drop-in. Declare it through a QueryParameter to migrate.
  */
 final class DateFilter extends AbstractFilter implements DateFilterInterface, JsonSchemaFilterInterface, OpenApiParameterFilterInterface
 {

src/Doctrine/Orm/Filter/ExistsFilter.php

@@ -116,6 +116,8 @@
  * Given that the collection endpoint is `/books`, you can filter books with the following query: `/books?exists[comment]=true`.
  *
  * @author Teoh Han Hui <teohhanhui@gmail.com>
+ *
+ * @deprecated since API Platform 4.4: extending {@see AbstractFilter} is deprecated. In 5.0 this filter is rewritten as a standalone filter (reading its value from the QueryParameter instead of the legacy `context['filters']` lookup) — same class name, same URL syntax, drop-in. Declare it through a QueryParameter to migrate.
  */
 final class ExistsFilter extends AbstractFilter implements ExistsFilterInterface, JsonSchemaFilterInterface, OpenApiParameterFilterInterface
 {

src/Doctrine/Orm/Filter/RangeFilter.php

@@ -108,6 +108,8 @@
  * Given that the collection endpoint is `/books`, you can filter books with the following query: `/books?price[between]=12.99..15.99`.
  *
  * @author Lee Siong Chan <ahlee2326@me.com>
+ *
+ * @deprecated since API Platform 4.4: extending {@see AbstractFilter} is deprecated. In 5.0 this filter is rewritten as a standalone overlay over {@see ComparisonFilter} (translating `[between]=X..Y` to `[gte]=X` + `[lte]=Y`, passing through `[gt]`/`[gte]`/`[lt]`/`[lte]`) — same class name, same URL syntax, drop-in. Declare it through a QueryParameter to migrate.
  */
 final class RangeFilter extends AbstractFilter implements RangeFilterInterface, OpenApiParameterFilterInterface
 {