• debian/copyright read in full (DEP-5, canonical Format URL); its four Files stanzas, the two stand-alone licence texts (BSD-3-Clause-Clear and BSD-3-Clause) and the absence of Files-Excluded were checked against the tree; the .orig tarball contains the same files as the tree apart from the two applied patches, so nothing needed excluding.
• Complete inventory of the 22 upstream files (top-level Makefile, Makefile.defs, go.mod, go.sum, LICENSE, README.md, main.go, main_test.go, secsipidx.1, .gitignore; csecsipid/{Makefile,secsipid.pc.in,csecsipid.go,libsecsipid.h,secsipid.h}; secsipid/{.gitignore,cache.go,cache_redis.go,secsipid.go,secsipid_test.go,system_cas.go}; .github/FUNDING.yml and .github/workflows/{go.yml,release.yaml}); all are matched by Files: * or by the later secsipid/system_cas.go, secsipidx.1 and debian/* stanzas.
• LICENSE is "The Clear BSD License", Copyright 2019-2020 asipto.com; README states "License: BSD 3-Clause Clear License"; both agree with the BSD-3-Clause-Clear stanza (only the year range differs, which is not noteworthy).
• secsipid/system_cas.go:3 says "Copied and pasted from go standard library: crypto/x509"; its own stanza names The Go Authors and BSD-3-Clause, so the copied code is attributed and licensed separately from Files: *.
• secsipidx.1 ends with "written by Victor Seva ... for the Debian project"; its stanza names Victor Seva and BSD-3-Clause-Clear.
• csecsipid/libsecsipid.h:1 is "Code generated by cmd/cgo; DO NOT EDIT."; its generator input, csecsipid/csecsipid.go with the //export comments, is shipped, so it is not a built file whose preferred form is missing.
• Grep of the whole tree for Copyright/(C)/©/SPDX/licence wording/All rights reserved found only LICENSE, README, secsipid/system_cas.go and the man page; grep for non-commercial, no-modification and field-of-use wording found nothing. No images, fonts, sounds, PDFs, minified code or vendored third-party libraries are in the tree.
• Prescan (dfsg-author-check) reported every holder found as named; the three holders declared in debian/copyright are exactly asipto.com (LICENSE, README), The Go Authors (system_cas.go) and Victor Seva (secsipidx.1, debian/*).
• Soname is libsecsipid.so.2 (Makefile.defs LIBVERMAJ=2 and the -soname flag in csecsipid/Makefile) and the binary package is libsecsipid2; the -dev package ships usr/include, the .a and the .so symlink and the .pc file, the library package ships .so.; the symbols file's soname line and package column are consistent and all 13 SecSIPID* functions exported by csecsipid/libsecsipid.h are listed.
• The symbols file's minimum versions still carry the retired predecessor package's values (1.0.0git20210108.dd56bc8f3ad, 1.1.1git..., 1.3.1) rather than 2.0.0; per deb-symbols(5) these only set minimal dependency versions, and since libsecsipid2 first exists at 2.0.0 the computed dependencies remain satisfiable, so this is not reported as a fault.
• debian/libsecsipid2.lintian-overrides no longer suppresses anything (package libsecsipid2 matches soname libsecsipid.so.2); it is dead but harmless, so not reported.
• Both patches are DEP-3 with From/Date/Subject/Forwarded (one PR); their combined effect is the pkgconfig file installed as /usr/lib//pkgconfig/secsipid-2.pc, which matches debian/libsecsipid-dev.install, and the LIBDIR variable passed by debian/rules.
• compat 13 with the dh sequencer; execute_after_dh_auto_build/override_dh_auto_install copy the Makefiles into the Go build dir and install into debian/tmp, which the .install files then pick up; dh_auto_install -- --no-source is dh_golang's documented programmatic-package option.
• Testsuite: autopkgtest-pkg-go (no debian/tests needed); golang-github-gomagedon-expectate-dev is marked <!nocheck>, which matches dh skipping dh_auto_test under nocheck at compat >= 13.
• Build-Depends: the Go modules actually linked (uuid, go-redis and its own dependencies cespare/xxhash, uber atomic, x/sys) are present, redis-dev's Depends pulling the indirect ones (checked with apt-cache), and dh-golang's default GO111MODULE=off makes go.mod/go.sum irrelevant to the build.
• Standards-Version 4.7.4 has the first two components of Policy 4.7.4.1, so it is current; Section/Architecture/Multi-Arch/Pre-Depends/Recommends and the Vcs-*/Homepage fields are all in order, and no maintainer scripts exist that could be non-idempotent.
• uscan found the packaged version as the newest upstream release (upstream 2.0.0, packaged 2.0.0).

• No build or test was run here. The Makefile-driven go build -buildmode=c-shared/c-archive in csecsipid/Makefile does not pass -trimpath (unlike dh's golang build step), so whether the shared library builds reproducibly was not checked.
• go.sum carries entries for modules not in go.mod (bsm/ginkgo, gomega, testify, zeebo/xxh3, klauspost/cpuid, yaml); under dh-golang's GOPATH mode (GO111MODULE=off) they are unused, so whether a module-mode build would object was not checked.

None.