Changelog

GetMetricsAsync now always returns at least a "Dataset Store" table

entry so the plugin shows in Dashboard Data tab even with 0 datasets.

Also reports saved query count when queries exist.

Data plugin had IIntentProvider implemented (DataPlugin.Intents.cs)

but never registered it in OnInitializeAsync — intents were unreachable

via the capability broker.

Changes:

• Register IIntentProvider and IIndexableContentProvider in OnInitializeAsync
• Add IIndexableContentProvider implementation (DataPlugin.IndexableContent.cs):

indexes plugin feature description, dataset schemas with column types,

and saved SQL queries for RAG vector search

• Add IIndexableContentProvider to class declaration
• Version bump: 1.21.2 → 1.21.3 (csproj + metadata)

DataPlugin.GetMetricsAsync was querying duckdb_tables() which no longer

exists after the DuckDB → SQLCipher migration. Replaced with

sqlite_master query to find dataset tables (ds_* pattern).

SQLite doesn't expose per-table byte sizes like DuckDB did, so the

method now returns a set of existing table names and the caller uses

the existing row-count × column-count heuristic for all tables.

• Rename QueryDuckDbTableSizesAsync → QueryDatasetTablesAsync
• Return HashSet<string> instead of Dictionary<string, long>
• Query sqlite_master WHERE type='table' AND name LIKE 'ds_%'
• Fix stale DuckDB references in comments
• Bump Data plugin 1.21.1 → 1.21.2

Root cause: deduplication used URL-only comparison, but feeds where

all entries share the same link (e.g., changelog feeds pointing to

/changelog) would reject every article after the first as a "duplicate".

Fix: add EntryId field to RssArticle populated from the Atom <id> or

RSS <guid> element. Dedup now checks entry ID first (globally unique

per spec), falling back to URL comparison for feeds without entry IDs.

MenuFlyout.Opening event doesn't fire when wired via XAML attribute

because MenuFlyout is not a Control in the visual tree — it's an

AvaloniaObject attached via Button.Flyout. Wire the event in the

constructor instead, where we can directly access the flyout instance.