feat: portability safeguards — signed goldens, HTTP contract suite, committed OpenAPI (Task 6)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/goldens_signed/caso_com_ub.expected.xml

@@ -0,0 +1,18 @@
+<NFe xmlns="http://www.portalfiscal.inf.br/nfe"><infNFe versao="4.00" Id="NFe41260712345678000190550010000010051100000050"><ide><cUF>41</cUF><cNF>10000005</cNF><natOp>Venda</natOp><mod>55</mod><serie>1</serie><nNF>1005</nNF><dhEmi>2026-07-16T10:20:00-03:00</dhEmi><tpNF>1</tpNF><idDest>1</idDest><cMunFG>4106902</cMunFG><tpImp>1</tpImp><tpEmis>1</tpEmis><cDV>0</cDV><tpAmb>2</tpAmb><finNFe>1</finNFe><indFinal>1</indFinal><indPres>1</indPres><procEmi>0</procEmi><verProc>sowai-auto/1b.1</verProc></ide><emit><CNPJ>12345678000190</CNPJ><xNome>AUTOPECAS THIAGO LTDA</xNome><xFant>Thiago Auto Center</xFant><enderEmit><xLgr>Rua das Autopecas</xLgr><nro>1500</nro><xBairro>Centro</xBairro><cMun>4106902</cMun><xMun>Curitiba</xMun><UF>PR</UF><CEP>80000000</CEP><cPais>1058</cPais><xPais>Brasil</xPais><fone>4133334444</fone></enderEmit><IE>1234567890</IE><CRT>1</CRT></emit><dest><CNPJ>99887766000155</CNPJ><xNome>NF-E EMITIDA EM AMBIENTE DE HOMOLOGACAO - SEM VALOR FISCAL</xNome><enderDest><xLgr>Av Cliente</xLgr><nro>50</nro><xBairro>Bairro</xBairro><cMun>4106902</cMun><xMun>Curitiba</xMun><UF>PR</UF><CEP>80000100</CEP><cPais>1058</cPais><xPais>Brasil</xPais></enderDest><indIEDest>9</indIEDest></dest><det nItem="1"><prod><cProd>PC001</cProd><cEAN>SEM GTIN</cEAN><xProd>Filtro de oleo</xProd><NCM>84212300</NCM><CFOP>5102</CFOP><uCom>UN</uCom><qCom>1</qCom><vUnCom>100.00</vUnCom><vProd>100.00</vProd><cEANTrib>SEM GTIN</cEANTrib><uTrib>UN</uTrib><qTrib>1</qTrib><vUnTrib>100.00</vUnTrib><indTot>1</indTot></prod><imposto><ICMS><ICMSSN102><orig>0</orig><CSOSN>102</CSOSN></ICMSSN102></ICMS><PIS><PISNT><CST>08</CST></PISNT></PIS><COFINS><COFINSNT><CST>08</CST></COFINSNT></COFINS><IBSCBS><CST>000</CST><cClassTrib>000001</cClassTrib><gIBSCBS><vBC>100.00</vBC><gIBSUF><pIBSUF>0.1000</pIBSUF><vIBSUF>10.00</vIBSUF></gIBSUF><gCBS><pCBS>0.9000</pCBS><vCBS>90.00</vCBS></gCBS></gIBSCBS></IBSCBS></imposto></det><total><ICMSTot><vBC>0.00</vBC><vICMS>0.00</vICMS><vICMSDeson>0.00</vICMSDeson><vFCP>0.00</vFCP><vBCST>0.00</vBCST><vST>0.00</vST><vFCPST>0.00</vFCPST><vFCPSTRet>0.00</vFCPSTRet><vProd>100.00</vProd><vFrete>0.00</vFrete><vSeg>0.00</vSeg><vDesc>0.00</vDesc><vII>0.00</vII><vIPI>0.00</vIPI><vIPIDevol>0.00</vIPIDevol><vPIS>0.00</vPIS><vCOFINS>0.00</vCOFINS><vOutro>0.00</vOutro><vNF>100.00</vNF></ICMSTot></total><transp><modFrete>9</modFrete></transp><pag><detPag><indPag>0</indPag><tPag>01</tPag><vPag>100.00</vPag></detPag></pag></infNFe><Signature xmlns="http://www.w3.org/2000/09/xmldsig#"><SignedInfo><CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/><SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/><Reference URI="#NFe41260712345678000190550010000010051100000050"><Transforms><Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/><Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/></Transforms><DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/><DigestValue>EIBfqHSPgzGamG7niiWJY8QjvaY=</DigestValue></Reference></SignedInfo><SignatureValue>lMywqdUdSFsbf5SR1kOmyByaFI1aSoUJwwgbz+P7Qri6iW+pJy+JJcapJnQcEdYbbFTqMJYJeRM87xHlQngg0SnPqd1ZjcLqZgXf6tm7GZriS3SNaMiXUC5EG9BnawvP4p7m5GviX3JJNKs2lvG0unBUtptq4aH/cZe5jd62SxeqyaeX4PxW/pbvkSBu3WndTLvM56vajMgimjbjQ8zLid85XJkVEAk9rV7KObZsHl0vuvFUqnZsAVaIJxB8nmmmcn/clT4AsPzhlkozR5YV0OjpP4sm08bYcvPcGcxxidxHE1o40xr6S6ozpiQENPEUBgTpNqMYaJTI0Rft3ERWaA==</SignatureValue><KeyInfo><X509Data><X509Certificate>MIIDHDCCAgSgAwIBAgIUOfWhuJYF+atF0Sv3tUJMbQzcRqwwDQYJKoZIhvcNAQEL
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+lXy6GZUYxpBNNdP9avLSwabIMcoEN37ARvaY2VDULBQ=
+</X509Certificate></X509Data></KeyInfo></Signature></NFe>