fix(route): Add fullPath in context copy #1244

Job	Run time
lint	35s
ubuntu-latest @ Go 1.18	33s
ubuntu-latest @ Go 1.18 -tags nomsgpack	29s
ubuntu-latest @ Go 1.18 -tags "sonic avx"	33s
ubuntu-latest @ Go 1.18 -tags go_json	30s
ubuntu-latest @ Go 1.19	1m 12s
ubuntu-latest @ Go 1.19 -tags nomsgpack	32s
ubuntu-latest @ Go 1.19 -tags "sonic avx"	1m 8s
ubuntu-latest @ Go 1.19 -tags go_json	39s
ubuntu-latest @ Go 1.20	1m 12s
ubuntu-latest @ Go 1.20 -tags nomsgpack	30s
ubuntu-latest @ Go 1.20 -tags "sonic avx"	32s
ubuntu-latest @ Go 1.20 -tags go_json	39s
macos-latest @ Go 1.18	1m 7s
macos-latest @ Go 1.18 -tags nomsgpack	1m 34s
macos-latest @ Go 1.18 -tags "sonic avx"	1m 9s
macos-latest @ Go 1.18 -tags go_json	58s
macos-latest @ Go 1.19	40s
macos-latest @ Go 1.19 -tags nomsgpack	48s
macos-latest @ Go 1.19 -tags "sonic avx"	47s
macos-latest @ Go 1.19 -tags go_json	45s
macos-latest @ Go 1.20	58s
macos-latest @ Go 1.20 -tags nomsgpack	1m 21s
macos-latest @ Go 1.20 -tags "sonic avx"	1m 32s
macos-latest @ Go 1.20 -tags go_json	1m 21s
	22m 4s

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