feat(types): asset_class constants for ch_*, ae_*, eu_* (MiCA taxonomy)

Extends AssetClass vocabulary with 17 new constants:
- CH: ch_equity, ch_dlt_security, ch_crypto, ch_fi (FINMA)
- AE: ae_equity, ae_crypto, ae_fi, ae_tokenized_security, ae_funds (SCA/DFSA/VARA/FSRA)
- EU: eu_equity, eu_mifid_fi, eu_ucits, eu_aif, eu_art, eu_emt, eu_cas, eu_dlt_security (MiCA)

AllAssetClasses() and ValidAssetClass() updated, existing tests pass.

pkg/types/asset_classes.go

@@ -0,0 +1,114 @@
+// Canonical asset class vocabulary. Every routing rule, provider config,
+// jurisdiction record, and regulated entity references these constants.
+// There is exactly one way to name an asset class.
+package types
+
+// AssetClass is a typed string for compile-time safety.
+type AssetClass string
+
+const (
+	// US asset classes
+	AssetClassUSEquity      AssetClass = "us_equity"
+	AssetClassUSCrypto      AssetClass = "us_crypto"
+	AssetClassUSOptions     AssetClass = "us_options"
+	AssetClassUSFixedIncome AssetClass = "us_fixed_income"
+
+	// UK asset classes (FCA)
+	AssetClassUKEquity AssetClass = "uk_equity"
+	AssetClassUKCrypto AssetClass = "uk_crypto"
+	AssetClassUKCFDs   AssetClass = "uk_cfds"
+	AssetClassUKFI     AssetClass = "uk_fi"
+
+	// India asset classes (SEBI)
+	AssetClassINEquity    AssetClass = "in_equity"
+	AssetClassINCommodity AssetClass = "in_commodity"
+	AssetClassINFnO       AssetClass = "in_fno"
+
+	// Singapore asset classes (MAS)
+	AssetClassSGEquity AssetClass = "sg_equity"
+	AssetClassSGCrypto AssetClass = "sg_crypto"
+	AssetClassSGREITs  AssetClass = "sg_reits"
+
+	// Australia asset classes (ASIC)
+	AssetClassAUEquity AssetClass = "au_equity"
+	AssetClassAUETF    AssetClass = "au_etf"
+	AssetClassAUCrypto AssetClass = "au_crypto"
+
+	// Canada asset classes (CIRO)
+	AssetClassCAEquity AssetClass = "ca_equity"
+	AssetClassCAETF    AssetClass = "ca_etf"
+	AssetClassCACrypto AssetClass = "ca_crypto"
+
+	// Brazil asset classes (CVM)
+	AssetClassBREquity  AssetClass = "br_equity"
+	AssetClassBROptions AssetClass = "br_options"
+	AssetClassBRFIIs    AssetClass = "br_fiis"
+	AssetClassBRCrypto  AssetClass = "br_crypto"
+
+	// Switzerland asset classes (FINMA)
+	AssetClassCHEquity      AssetClass = "ch_equity"
+	AssetClassCHDLTSecurity AssetClass = "ch_dlt_security"
+	AssetClassCHCrypto      AssetClass = "ch_crypto"
+	AssetClassCHFI          AssetClass = "ch_fi"
+
+	// UAE asset classes (SCA/DFSA/VARA/FSRA)
+	AssetClassAEEquity            AssetClass = "ae_equity"
+	AssetClassAECrypto            AssetClass = "ae_crypto"
+	AssetClassAEFI                AssetClass = "ae_fi"
+	AssetClassAETokenizedSecurity AssetClass = "ae_tokenized_security"
+	AssetClassAEFunds             AssetClass = "ae_funds"
+
+	// EU asset classes (MiCA-harmonized)
+	AssetClassEUEquity      AssetClass = "eu_equity"
+	AssetClassEUMiFIDFI     AssetClass = "eu_mifid_fi"
+	AssetClassEUUCITS       AssetClass = "eu_ucits"
+	AssetClassEUAIF         AssetClass = "eu_aif"
+	AssetClassEUART         AssetClass = "eu_art"
+	AssetClassEUEMT         AssetClass = "eu_emt"
+	AssetClassEUCAS         AssetClass = "eu_cas"
+	AssetClassEUDLTSecurity AssetClass = "eu_dlt_security"
+
+	// Wildcard — matches any asset class in routing rules
+	AssetClassWildcard AssetClass = "*"
+)
+
+// AllAssetClasses returns every defined asset class (excluding wildcard).
+func AllAssetClasses() []AssetClass {
+	return []AssetClass{
+		AssetClassUSEquity, AssetClassUSCrypto, AssetClassUSOptions, AssetClassUSFixedIncome,
+		AssetClassUKEquity, AssetClassUKCrypto, AssetClassUKCFDs, AssetClassUKFI,
+		AssetClassINEquity, AssetClassINCommodity, AssetClassINFnO,
+		AssetClassSGEquity, AssetClassSGCrypto, AssetClassSGREITs,
+		AssetClassAUEquity, AssetClassAUETF, AssetClassAUCrypto,
+		AssetClassCAEquity, AssetClassCAETF, AssetClassCACrypto,
+		AssetClassBREquity, AssetClassBROptions, AssetClassBRFIIs, AssetClassBRCrypto,
+		AssetClassCHEquity, AssetClassCHDLTSecurity, AssetClassCHCrypto, AssetClassCHFI,
+		AssetClassAEEquity, AssetClassAECrypto, AssetClassAEFI, AssetClassAETokenizedSecurity, AssetClassAEFunds,
+		AssetClassEUEquity, AssetClassEUMiFIDFI, AssetClassEUUCITS, AssetClassEUAIF,
+		AssetClassEUART, AssetClassEUEMT, AssetClassEUCAS, AssetClassEUDLTSecurity,
+	}
+}
+
+// ValidAssetClass returns true if s is a known asset class or wildcard.
+func ValidAssetClass(s string) bool {
+	if s == string(AssetClassWildcard) {
+		return true
+	}
+	for _, ac := range AllAssetClasses() {
+		if string(ac) == s {
+			return true
+		}
+	}
+	return false
+}
+
+// AssetClassStrings returns all asset class string values (for Base select fields).
+func AssetClassStrings() []string {
+	all := AllAssetClasses()
+	out := make([]string, len(all)+1)
+	for i, ac := range all {
+		out[i] = string(ac)
+	}
+	out[len(all)] = string(AssetClassWildcard)
+	return out
+}

pkg/types/asset_classes_test.go

@@ -0,0 +1,56 @@
+package types
+
+import "testing"
+
+func TestValidAssetClass(t *testing.T) {
+	valid := []string{
+		"us_equity", "us_crypto", "us_options", "us_fixed_income",
+		"uk_equity", "uk_crypto", "uk_cfds", "uk_fi",
+		"in_equity", "in_commodity", "in_fno",
+		"sg_equity", "sg_crypto", "sg_reits",
+		"au_equity", "au_etf", "au_crypto",
+		"ca_equity", "ca_etf", "ca_crypto",
+		"br_equity", "br_options", "br_fiis", "br_crypto",
+		"*",
+	}
+	for _, v := range valid {
+		if !ValidAssetClass(v) {
+			t.Errorf("ValidAssetClass(%q) = false, want true", v)
+		}
+	}
+}
+
+func TestInvalidAssetClass(t *testing.T) {
+	invalid := []string{"", "equity", "stock", "US_EQUITY", "us-equity", "crypto"}
+	for _, v := range invalid {
+		if ValidAssetClass(v) {
+			t.Errorf("ValidAssetClass(%q) = true, want false", v)
+		}
+	}
+}
+
+func TestAllAssetClassesNoDuplicates(t *testing.T) {
+	seen := map[AssetClass]bool{}
+	for _, ac := range AllAssetClasses() {
+		if seen[ac] {
+			t.Fatalf("duplicate asset class: %s", ac)
+		}
+		seen[ac] = true
+	}
+}
+
+func TestAssetClassStringsIncludesWildcard(t *testing.T) {
+	strs := AssetClassStrings()
+	found := false
+	for _, s := range strs {
+		if s == "*" {
+			found = true
+		}
+	}
+	if !found {
+		t.Fatal("AssetClassStrings() missing wildcard")
+	}
+	if len(strs) != len(AllAssetClasses())+1 {
+		t.Fatalf("AssetClassStrings() len = %d, want %d", len(strs), len(AllAssetClasses())+1)
+	}
+}