Fixes

Fixed a bug that Groonga couldn't find records that were added after index construction when centroid_column was used

If this bug occurs, Groonga doesn't return records that added as below.

plugin_register language_model/knn

table_create Data TABLE_NO_KEY
column_create Data text COLUMN_SCALAR ShortText
column_create Data rabitq_code COLUMN_SCALAR ShortBinary

load --table Data
[
{"text": "I am a boy."}
]

table_create RaBitQ TABLE_HASH_KEY UInt32 \
  --default_tokenizer \
    'TokenLanguageModelKNN("model", "hf:///groonga/multilingual-e5-base-Q4_K_M-GGUF", \
                           "centroid_column", "centroid", \
                           "code_column", "rabitq_code", \
                           "passage_prefix", "passage: ", \
                           "query_prefix", "query: ")'
column_create RaBitQ centroid COLUMN_VECTOR Float32
column_create RaBitQ data_text COLUMN_INDEX Data text

load --table Data
[
{"text": "This is an apple."}
]

select Data \
  --filter 'language_model_knn(text, "fruit")' \
  --output_columns text
[
  [
    0,
    0.0,
    0.0
  ],
  [
    [
      [
        1
      ],
      [
        [
          "text",
          "ShortText"
        ]
      ],
      [
        "I am a boy."
      ]
    ]
  ]
]

Experimental features