Incorrect handling of KNN query when using an int field for the vector

[PavelShilin89]

Description:
When creating a table with a vector field of type int and attempting to insert data as a string array into this field, an error occurs when executing a KNN query. Instead of returning a detailed error indicating the incorrect data type for the vector field, the system returns a message about the incorrect return type in the getQueryVectorValue() function.

Expected result:
The system should correctly handle cases when an inappropriate data type is used for a vector field and return more informative errors indicating data type mismatch or incorrect format of inserted values.

ERROR 1064 (42000): Invalid data type 'int' for vector field. Use a vector-compatible type.

MRE

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CREATE TABLE knn_test (id BIGINT, model TEXT, vector int)
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INSERT INTO knn_test (id, model, vector) VALUES (1, 'Model_1', '[0.9012, 0.2126, 0.2879, 0.7552]')
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SELECT count(*) FROM knn_test WHERE knn(vector, 10, 1)
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ERROR 1064 (42000) at line 1: Manticoresearch\Buddy\Base\Plugin\Knn\Handler::getQueryVectorValue(): Return value must be of type string|false, int returned

[djklim87]

Waiting for review #371

[djklim87]

Blocked by #372

[djklim87]

fixed in manticoresoftware/manticoresearch@8f0cc03

[PavelShilin89]

Testing performed in PR - manticoresoftware/manticoresearch#2682