Remove obsolete ACE client from NoaaClient package

[Demosfen]

Context

NOAA RTSW JSON feeds (rtsw_mag_1m.json, rtsw_wind_1m.json) now provide unified real-time magnetometer and solar wind plasma data from multiple sources (SOLAR1, ACE, IMAP) with active / source metadata.

The legacy ACE text feeds (ace-magnetometer.txt, ace-swepam.txt) overlap with RTSW rows where source == "ACE". For operational mag/wind use cases, IRtswClient is sufficient.

IAceClient is marked [Obsolete] in favor of IRtswClient (see PR #2 / issue #162 follow-up).

Scope

Remove from Integrations package:

• IAceClient, AceClient, ACE parsers and response models
• ACE unit tests, benchmark projects, and embedded samples
• ACE menu entries in NoaaClientSample
• AddHttpClient<IAceClient, AceClient>() registration
• ACE sections in README, release notes, and changelog (add explicit breaking-change entry)

Migration guide

Replace:

var mag = await aceClient.GetMagnetometerDataAsync(ct);
var wind = await aceClient.GetSwepamDataAsync(ct);

With:

var mag = await rtswClient.GetMagnetometerDataAsync(ct);
var wind = await rtswClient.GetSolarWindPlasmaDataAsync(ct);

// Primary NOAA-selected feed
var activeMag = mag.Where(r => r.Active);
var activeWind = wind.Where(r => r.Active);

// ACE-specific rows (if needed)
var aceMag = mag.Where(r => r.Source == "ACE");

Out of scope (separate work)

• SWeather-core still has its own PreliminaryDataImport/ExternalResources/Ace client — migrate in a dedicated SWeather-core task after this package change ships.

Acceptance criteria

• IAceClient and ACE namespace removed from public API
• dotnet build / dotnet test pass
• Sample app exposes RTSW + KpIndex only
• CHANGELOG documents breaking removal of ACE client

Related

• #162 (RTSW client cutover)
• PR Integrations: add RTSW client and remove DSCOVR surface #2