Add the CI validation gate and seed ProtoBot's specification store

Plan ID

EM-08

Purpose

Make ears-manager part of ProtoBot's own repository workflow and prove the first release is usable in CI.

Scope

• Build and test the Go binary in CI.
• Run ears-manager check on specification branches as a merge gate.
• Seed ProtoBot's initial .protobot configuration, artifact registry, and representative records through the governed path.
• Detect direct edits to registered specification files before merge.
• Document the local developer command and CI failure/retry behavior.

Dependencies

Depends on EM-07. The command and validation behavior comes from EM-02 through EM-05.

Acceptance criteria

• CI fails on malformed records, unsafe paths, digest mismatches, dangling references, relationship cycles, and invalid EARS text.
• CI passes on the seeded valid store.
• A direct edit to a registered artifact is detected without staging unrelated files.
• Local and CI diagnostics use the same stable machine-readable error shape.
• The initial self-hosting fixture is reproducible from a clean checkout.

Out of scope

The Drafting Table, WMS, and Job Site integration remain in #66, #76, and #77.

Start by reviewing EM-07 and the command and validation behavior from EM-02 through EM-05, then locate the ears-manager workflow and .protobot seed path. Done means CI builds and tests the Go binary, runs ears-manager check as a merge gate, detects direct registered-artifact edits, and reproduces the valid self-hosting fixture from a clean checkout.