Store runner capabilities from FetchTask poll

- Update FetchTask handler to store capabilities_json from request
- Use GitCaddy actions-proto-go v0.5.6 with CapabilitiesJson field
- Capabilities include disk space, tools, docker, and limitations

go.sum

@@ -29,8 +29,8 @@ dario.cat/mergo v1.0.2/go.mod h1:E/hbnu0NxMFBjpMIE34DRGLWqDy0g5FuKDhCb31ngxA=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
-git.marketally.com/gitcaddy/actions-proto-go v0.5.3 h1:tf625YKv1Bykxr9CIcoqilC2MWiO/yBN3srlJYnFQqM=
-git.marketally.com/gitcaddy/actions-proto-go v0.5.3/go.mod h1:mn7Wkqz6JbnTOHQpot3yDeHx+O5C9EGhMEE+htvHBas=
+git.marketally.com/gitcaddy/actions-proto-go v0.5.6 h1:G7T0vpx8HyCFWd0YMJ9sp8rCsWtzFrCJK4BMdOFJa1A=
+git.marketally.com/gitcaddy/actions-proto-go v0.5.6/go.mod h1:RPu21UoRD3zSAujoZR6LJwuVNa2uFRBveadslczCRfQ=
 gitea.com/gitea/act v0.261.7-0.20251003180512-ac6e4b751763 h1:ohdxegvslDEllZmRNDqpKun6L4Oq81jNdEDtGgHEV2c=
 gitea.com/gitea/act v0.261.7-0.20251003180512-ac6e4b751763/go.mod h1:Pg5C9kQY1CEA3QjthjhlrqOC/QOT5NyWNjOjRHw23Ok=
 gitea.com/gitea/go-xsd-duration v0.0.0-20220703122237-02e73435a078 h1:BAFmdZpRW7zMQZQDClaCWobRj9uL1MR3MzpCVJvc5s4=
@@ -78,8 +78,6 @@ github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym
 github.com/DataDog/zstd v1.5.7 h1:ybO8RBeh29qrxIhCA9E8gKY6xfONU9T6G6aP9DTKfLE=
 github.com/DataDog/zstd v1.5.7/go.mod h1:g4AWEaM3yOg3HYfnJ3YIawPnVdXJh9QME85blwSAmyw=
 github.com/Julusian/godocdown v0.0.0-20170816220326-6d19f8ff2df8/go.mod h1:INZr5t32rG59/5xeltqoCJoNY7e5x/3xoY9WSWVWg74=
-github.com/Masterminds/semver v1.5.0 h1:H65muMkzWKEuNDnfl9d70GUjFniHKHRbFPGBuZ3QEww=
-github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/Masterminds/semver/v3 v3.4.0 h1:Zog+i5UMtVoCU8oKka5P7i9q9HgrJeGzI9SA1Xbatp0=
 github.com/Masterminds/semver/v3 v3.4.0/go.mod h1:4V+yj/TJE1HU9XfppCwVMZq3I84lprf4nC11bSS5beM=
 github.com/Microsoft/go-winio v0.5.2/go.mod h1:WpS1mjBmmwHBEWmogvA2mj8546UReBk4v8QkMxJ6pZY=