Add probo-agent CLI and deviceagent library

Introduce the standalone device agent binary and shared library
for enrollment, posture checks, self-update, and OS service
integration. Include build targets, module deps, and release
workflow so the agent can ship independently of server changes.

Signed-off-by: Bryan Frimin <bryan@probo.com>

go.mod

@@ -20,7 +20,6 @@ require (
 	github.com/digitorus/timestamp v0.0.0-20250524132541-c45532741eea
 	github.com/go-chi/chi/v5 v5.2.5
 	github.com/go-chi/cors v1.2.2
-	github.com/go-git/go-git/v5 v5.19.1
 	github.com/jackc/pgx/v5 v5.9.2
 	github.com/jhillyerd/enmime v1.3.0
 	github.com/microcosm-cc/bluemonday v1.0.27
@@ -31,6 +30,7 @@ require (
 	github.com/pires/go-proxyproto v0.12.0
 	github.com/prometheus/client_golang v1.23.2
 	github.com/scim2/filter-parser/v2 v2.2.1
+	github.com/sigstore/sigstore-go v1.1.4
 	github.com/stretchr/testify v1.11.1
 	github.com/vektah/gqlparser/v2 v2.5.33
 	github.com/vikstrous/dataloadgen v0.0.10
@@ -51,13 +51,12 @@ require (
 )
 
 require (
-	dario.cat/mergo v1.0.0 // indirect
-	github.com/Microsoft/go-winio v0.6.2 // indirect
-	github.com/ProtonMail/go-crypto v1.1.6 // indirect
+	github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
 	github.com/atotto/clipboard v0.1.4 // indirect
 	github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
 	github.com/aymerick/douceur v0.2.0 // indirect
 	github.com/bahlo/generic-list-go v0.2.0 // indirect
+	github.com/blang/semver v3.5.1+incompatible // indirect
 	github.com/buger/jsonparser v1.1.2 // indirect
 	github.com/catppuccin/go v0.3.0 // indirect
 	github.com/charmbracelet/bubbles v1.0.0 // indirect
@@ -68,35 +67,61 @@ require (
 	github.com/charmbracelet/x/exp/strings v0.0.0-20240722160745-212f7b056ed0 // indirect
 	github.com/charmbracelet/x/term v0.2.2 // indirect
 	github.com/clipperhouse/displaywidth v0.9.0 // indirect
-	github.com/cloudflare/circl v1.6.3 // indirect
-	github.com/cyphar/filepath-securejoin v0.6.1 // indirect
+	github.com/cyberphone/json-canonicalization v0.0.0-20241213102144-19d51d7fe467 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/emirpasic/gods v1.18.1 // indirect
 	github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
-	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
-	github.com/go-git/go-billy/v5 v5.9.0 // indirect
-	github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 // indirect
+	github.com/go-openapi/analysis v0.24.1 // indirect
+	github.com/go-openapi/errors v0.22.4 // indirect
+	github.com/go-openapi/jsonpointer v0.22.1 // indirect
+	github.com/go-openapi/jsonreference v0.21.3 // indirect
+	github.com/go-openapi/loads v0.23.2 // indirect
+	github.com/go-openapi/runtime v0.29.2 // indirect
+	github.com/go-openapi/spec v0.22.1 // indirect
+	github.com/go-openapi/strfmt v0.25.0 // indirect
+	github.com/go-openapi/swag v0.25.4 // indirect
+	github.com/go-openapi/swag/cmdutils v0.25.4 // indirect
+	github.com/go-openapi/swag/conv v0.25.4 // indirect
+	github.com/go-openapi/swag/fileutils v0.25.4 // indirect
+	github.com/go-openapi/swag/jsonname v0.25.4 // indirect
+	github.com/go-openapi/swag/jsonutils v0.25.4 // indirect
+	github.com/go-openapi/swag/loading v0.25.4 // indirect
+	github.com/go-openapi/swag/mangling v0.25.4 // indirect
+	github.com/go-openapi/swag/netutils v0.25.4 // indirect
+	github.com/go-openapi/swag/stringutils v0.25.4 // indirect
+	github.com/go-openapi/swag/typeutils v0.25.4 // indirect
+	github.com/go-openapi/swag/yamlutils v0.25.4 // indirect
+	github.com/go-openapi/validate v0.25.1 // indirect
+	github.com/google/certificate-transparency-go v1.3.2 // indirect
+	github.com/google/go-containerregistry v0.20.7 // indirect
 	github.com/gorilla/css v1.0.1 // indirect
+	github.com/in-toto/attestation v1.1.2 // indirect
+	github.com/in-toto/in-toto-golang v0.9.0 // indirect
 	github.com/invopop/jsonschema v0.13.0 // indirect
-	github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
-	github.com/kevinburke/ssh_config v1.2.0 // indirect
-	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
 	github.com/lucasb-eyer/go-colorful v1.3.0 // indirect
-	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/mailru/easyjson v0.9.0 // indirect
 	github.com/mattn/go-localereader v0.0.1 // indirect
 	github.com/mitchellh/hashstructure/v2 v2.0.2 // indirect
 	github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
 	github.com/muesli/cancelreader v0.2.2 // indirect
-	github.com/pjbgf/sha1cd v0.6.0 // indirect
+	github.com/oklog/ulid v1.3.1 // indirect
+	github.com/opencontainers/go-digest v1.0.0 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
-	github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect
-	github.com/skeema/knownhosts v1.3.1 // indirect
+	github.com/secure-systems-lab/go-securesystemslib v0.9.1 // indirect
+	github.com/shibumi/go-pathspec v1.3.0 // indirect
+	github.com/sigstore/protobuf-specs v0.5.0 // indirect
+	github.com/sigstore/rekor v1.4.3 // indirect
+	github.com/sigstore/rekor-tiles/v2 v2.0.1 // indirect
+	github.com/sigstore/sigstore v1.10.0 // indirect
+	github.com/sigstore/timestamp-authority/v2 v2.0.3 // indirect
+	github.com/theupdateframework/go-tuf/v2 v2.3.0 // indirect
+	github.com/transparency-dev/formats v0.0.0-20251017110053-404c0d5b696c // indirect
+	github.com/transparency-dev/merkle v0.0.2 // indirect
 	github.com/wk8/go-ordered-map/v2 v2.1.8 // indirect
-	github.com/xanzy/ssh-agent v0.3.3 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
+	go.mongodb.org/mongo-driver v1.17.6 // indirect
+	go.yaml.in/yaml/v3 v3.0.4 // indirect
 	go.yaml.in/yaml/v4 v4.0.0-rc.3 // indirect
 	golang.org/x/telemetry v0.0.0-20260311193753-579e4da9a98c // indirect
-	gopkg.in/warnings.v0 v0.1.2 // indirect
 )
 
 require (
@@ -122,10 +147,10 @@ require (
 	github.com/chromedp/sysutil v1.1.0 // indirect
 	github.com/clipperhouse/stringish v0.1.1 // indirect
 	github.com/clipperhouse/uax29/v2 v2.7.0 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/di-wu/parser v0.3.0 // indirect
 	github.com/di-wu/xsd-datetime v1.0.0 // indirect
-	github.com/digitorus/pkcs7 v0.0.0-20230713084857-e76b763bdc49 // indirect
+	github.com/digitorus/pkcs7 v0.0.0-20230818184609-3a137a874352 // indirect
 	github.com/dnephin/pflag v1.0.7 // indirect
 	github.com/elimity-com/scim v0.0.0-20240320110924-172bf2aee9c8
 	github.com/fatih/color v1.19.0 // indirect
@@ -165,7 +190,7 @@ require (
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/olekukonko/tablewriter v1.1.3 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
 	github.com/prometheus/common v0.67.5 // indirect
 	github.com/prometheus/procfs v0.20.1 // indirect
@@ -191,7 +216,7 @@ require (
 	go.opentelemetry.io/otel/sdk v1.43.0
 	go.opentelemetry.io/proto/otlp v1.10.0 // indirect
 	go.yaml.in/yaml/v2 v2.4.4 // indirect
-	golang.org/x/mod v0.34.0 // indirect
+	golang.org/x/mod v0.34.0
 	golang.org/x/net v0.53.0
 	golang.org/x/sys v0.43.0 // indirect
 	golang.org/x/term v0.42.0