Add eBay Browse API integration with daily call quota

eBay marketplaces are now polled through eBay's official Buy > Browse API (client-credentials OAuth2) instead of an Apify scraper actor; Apify still handles Yahoo JP and Mercari. Browse API calls are tracked per day in a new ebay_api_usage table and capped (default 5000, configurable) on eBay's Pacific-time reset clock, so polling halts before the limit is hit. Credentials live in config.toml [ebay] and are overridable via /settings, which also surfaces the day's running call count.

Also carries the server.secure_cookies config plumbing (field, accessor, example) consumed by the following commit.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

internal/ebay/types.go

@@ -0,0 +1,94 @@
+package ebay
+
+import "strings"
+
+// SearchParams is the input to a single Browse API item_summary/search call.
+// It is provider-specific and is carried as the opaque input payload of a
+// scheduler plan, mirroring how Apify actor inputs are carried.
+type SearchParams struct {
+	// MarketplaceID is an eBay marketplace identifier such as EBAY_US.
+	MarketplaceID string
+	// Query is the keyword search string. Required; the Browse API rejects
+	// an empty q.
+	Query string
+	// ListingType is Veola's vocabulary ("all", "bin"/"buy_it_now",
+	// "auction"); it is mapped to a buyingOptions filter.
+	ListingType string
+	// Limit caps the number of results requested (Browse API max is 200).
+	Limit int
+}
+
+// Listing is one normalized active eBay listing. The scheduler converts these
+// into the shared apify.UnifiedResult shape so the rest of the pipeline
+// (dedup, filter, alert) is provider-agnostic.
+type Listing struct {
+	Title    string
+	Price    float64
+	Currency string
+	URL      string
+	Store    string
+	ImageURL string
+}
+
+// MarketplaceID maps a Veola marketplace string (e.g. "ebay.com",
+// "ebay.co.uk") to an eBay Browse API marketplace identifier. Unknown or
+// bare "ebay" values fall back to EBAY_US.
+func MarketplaceID(marketplace string) string {
+	m := strings.ToLower(strings.TrimSpace(marketplace))
+	switch {
+	case strings.Contains(m, "ebay.co.uk"):
+		return "EBAY_GB"
+	case strings.Contains(m, "ebay.de"):
+		return "EBAY_DE"
+	case strings.Contains(m, "ebay.com.au"):
+		return "EBAY_AU"
+	case strings.Contains(m, "ebay.ca"):
+		return "EBAY_CA"
+	case strings.Contains(m, "ebay.fr"):
+		return "EBAY_FR"
+	case strings.Contains(m, "ebay.it"):
+		return "EBAY_IT"
+	case strings.Contains(m, "ebay.es"):
+		return "EBAY_ES"
+	case strings.Contains(m, "ebay.at"):
+		return "EBAY_AT"
+	case strings.Contains(m, "ebay.ch"):
+		return "EBAY_CH"
+	case strings.Contains(m, "ebay.ie"):
+		return "EBAY_IE"
+	case strings.Contains(m, "ebay.nl"):
+		return "EBAY_NL"
+	case strings.Contains(m, "ebay.com.hk"):
+		return "EBAY_HK"
+	case strings.Contains(m, "ebay.com.sg"):
+		return "EBAY_SG"
+	case strings.Contains(m, "ebay.com.my"):
+		return "EBAY_MY"
+	case strings.Contains(m, "ebay.ph"):
+		return "EBAY_PH"
+	case strings.Contains(m, "ebay.pl"):
+		return "EBAY_PL"
+	default:
+		// "ebay.com" and any bare/unknown eBay marketplace.
+		return "EBAY_US"
+	}
+}
+
+// IsEbayMarketplace reports whether a Veola marketplace string should be
+// polled through the official eBay Browse API.
+func IsEbayMarketplace(marketplace string) bool {
+	return strings.Contains(strings.ToLower(marketplace), "ebay")
+}
+
+// buyingOptionsFilter maps Veola's listing-type vocabulary to the Browse API
+// "filter" query parameter. An empty string means no filter ("all").
+func buyingOptionsFilter(listingType string) string {
+	switch strings.ToLower(strings.TrimSpace(listingType)) {
+	case "bin", "buy_it_now", "fixed_price":
+		return "buyingOptions:{FIXED_PRICE}"
+	case "auction":
+		return "buyingOptions:{AUCTION}"
+	default:
+		return ""
+	}
+}