[samyk]

Adds an info provider for the SparkFun shop. It needs no key and is off until PROVIDER_SPARKFUN_ENABLED=1 is set.

sparkfun.com is a Magento 2 shop with an open GraphQL endpoint, which the provider uses for everything it exposes; the documents and the "Features & Specs" list are only on the product page, so details read that too. SparkFun offers no official API for this, so it could break at any time.

What it does:

• Search: one GraphQL request, up to 20 results, with a product whose SKU matches the keyword exactly sorted first (the shop's search is fuzzy and can list a neighbouring SKU first).
• Details: one GraphQL request plus one product page request. The ID can be a SKU (DEV-13975, matched exactly), a bare number (13975, accepted only if a SKU ends in that number), or a URL key, so both /products/13975 and /<slug>.html URLs resolve.
• Returns name, short description, the description HTML plus the feature list as notes, category path, product URL, the main image and gallery (videos dropped), USD prices with quantity tiers (without tax), mass, and the documents linked on the product page (schematics, datasheets, hookup guides, Eagle files, GitHub). If the page fails to load, the documents linked in the description are still returned.
• Manufacturer is "SparkFun"; the SKU is the provider ID and the MPN.

Politeness:

• A requestDelay setting (PROVIDER_SPARKFUN_REQUEST_DELAY, 0-60 s, default 10) is the minimum time between any two requests (GraphQL and product pages). A request that comes too early waits; the next allowed time is kept in the cache so it holds across processes.
• After an HTTP 403, 429 or 503 the provider sends nothing for one hour and lookups fail with a message saying until when it is paused.

Includes unit tests with mocked HTTP (22 tests), the settings class, translation strings and a docs section.

Notes for review:

• Verified against the live site for DEV-13975 and BOB-12009.
• Retired products are no longer in the shop's catalog, so they are not found.
• The manufacturer is always "SparkFun", which is wrong for resold third-party products; I found no usable brand field.
• The shop's weight field has no unit; the provider assumes pounds, which gives plausible masses for the products checked.
• Parameters are usually empty: only feature bullets of the form "Name: value" become parameters, the rest of the feature list goes into the notes.
• With the 10 s default a details lookup takes 10-20 s; say if you would prefer a lower default.

[codecov]

Codecov Report

❌ Patch coverage is 94.77912% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 64.67%. Comparing base (a7f2d49) to head (d7ffcc4).

Files with missing lines	Patch %	Lines
.../InfoProviderSystem/Providers/SparkFunProvider.php	94.77%	13 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1579      +/-   ##
============================================
+ Coverage     64.46%   64.67%   +0.21%     
- Complexity    10210    10295      +85     
============================================
  Files           762      763       +1     
  Lines         32711    32960     +249     
============================================
+ Hits          21087    21317     +230     
- Misses        11624    11643      +19     

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