feat: add number of indexed indicators to available datasets tool output #191

[Fedir-Yatsenko]

Applicable issues

• closes Add number of indexed indicators to available datasets tool output #191

Description of changes

Add optional per-dataset and total indicator counts to the available datasets tool response, controlled by include_indicator_count flag (disabled by default) in AvailableDatasetsDetails.

• Add get_size_per_version to VectorStore base and PgVectorStore (single GROUP BY query to avoid N+1)
• Add get_indicator_counts to ChannelServiceFacade
• Pass indicator counts through formatters (simple, detailed, list)
• Add i18n strings for EN and UK locales

Checklist

• Title of the pull request follows Conventional Commits specification
• Deployed and tested in a Review environment.

By submitting this pull request, I confirm that my contribution is made under the terms of the MIT license.

[Fedir-Yatsenko]

Example output from the Available Datasets tool.

Total datasets: 2
Total providers: 2
Total number of indicators: 1340

Provider: IMF.RES

Total datasets from this provider: 1

• IMF.RES:WEO - Sample
  • Source ID: IMF.RES:WEO(9.0.0)
  • Description: The World Economic Outlook (WEO) database contains selected macroeconomic data series from the statistical appendix of the World Economic Outlook report, which presents the IMF staff's analysis and projections of economic developments at the global level, in major country groups and in many individual countries. The WEO is released in April and September/October each year. Use this database to find data on national accounts, gross domestic product (GDP), inflation, unemployment rates, balance of payments, fiscal indicators, trade for countries and country groups (aggregates), and commodity prices whose data are reported by the IMF. Data are available from 1980 to the present, and projections are given for the next two years. Additionally, medium-term projections are available for selected indicators. For some countries, data are incomplete or unavailable for certain years.

• Provider: IMF.RES
• Last Updated: Oct 2025
• URL: https://data.imf.org/en/datasets/IMF.RES:WEO
• Number of indicators: 145

Provider: IMF.STA

Total datasets from this provider: 1

• IMF.STA:BOP - Sample
  • Source ID: IMF.STA:BOP(21.0.0)
  • Description: The Balance of Payments (BOP) is a statistical statement that summarizes transactions between residents and nonresidents during a period. It consists of the goods and services account, the primary income account, the secondary income account, the capital account, and the financial account.
  • Provider: IMF.STA
  • Last Updated: Jun 2025
  • URL: https://data.imf.org/en/datasets/IMF.STA:BOP
  • Number of indicators: 1195

[Fedir-Yatsenko]

/deploy-review

GitHub actions run: 22765968044
Environment URL: review-environment | pipeline

[navalnica]

let's reuse docstrings from base class methods, and update it for the new function:

@abstractmethod
    async def get_total_size(self) -> int:
        """Returns the total number of documents in the vector store."""

    @abstractmethod
    async def get_size(self, version_ids: set[int]) -> int:
        """Returns the number of documents in the vector store for the specified version IDs."""

    @abstractmethod
    async def get_size_per_version(self, version_ids: set[int]) -> dict[int, int]:
        """Returns the number of documents grouped by version_id."""