feat: add radius parameter for spatial filtering for history api and expanded response api spatial queries using history api v2 style

[motamman]

Summary

Extends the V2 History API with spatial filtering and enhanced path expressions, and adds a radius query parameter to the Resources API for cross-API consistency.

History API extensions

• Spatial filtering: New bbox, radius, distance, and position query parameters on /history/values. Supports two equivalent styles for radius queries — the compact radius=lon, lat, meters form and the Resources API-compatible distance=meters&position=[lon,lat] form. Mutually exclusive parameter combinations are validated and return HTTP 400.
• context parameter: Allows querying historical data for a specific vessel or object (e.g. context=vessels.urn:mrn:imo:mmsi:123456789), defaulting to vessels.self.
• 4-segment path expressions: New path:aggregate:smoothing:param syntax for post-aggregation smoothing (e.g. navigation.speedOverGround:average:sma:5 computes bucket averages then applies a 5-sample Simple Moving Average). Supports sma and ema smoothing methods.
• Updated ValuesRequest type: PathSpec gains an optional smoothing field; ValuesRequest gains optional bbox and radius fields so providers receive structured, validated spatial data.

Resources API

• New radius query parameter: Added RadiusParam to the OpenAPI spec and referenced in all four resource collection GET endpoints (routes, waypoints, regions, notes). The built-in resources provider's processParameters() parses radius=lon,lat,meters into the same geobounds polygon used by bbox and distance+position.

Tests

• 16 unit tests for splitPathExpression and parseValuesQuery covering all path expression formats, spatial parameter parsing, mutual exclusivity validation, and error cases.
• Integration test for radius filtering on the Resources API, mirroring the existing bbox test.

Documentation

• History API docs: expanded query parameter table, new sections on path expressions and spatial filtering with examples.
• Resources API docs: added radius example alongside existing bbox and distance examples.

Test plan

• npm run build compiles cleanly
• npm test — all existing and new tests pass
• radius query on resources returns the same results as the equivalent bbox query
• Mutual exclusivity validated (bbox + radius, radius + distance/position)