test: cover input_set git context and DeployAwsAgentCore schema sync

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Description

Adds regression tests for two recently merged changes where production behavior was at risk but test coverage was incomplete.

Risky behavior now covered

1. Remote input set git context (fix(execute): forward git context so remote input sets resolve correctly #579) — Without branch/repoName/connectorRef/storeType on input-set GET, Harness silently resolves Git-backed input sets from the default branch (wrong values, no error). Tests lock this at both the registry dispatch layer and the public harness_get tool contract.

2. Schema auto-sync (chore: auto-sync harness schemas #584) — DeployAwsAgentCoreRevision step definitions added to v0 pipeline/template bundles must remain discoverable via harness_schema and present in bundled schema modules (same contract pattern as DeployGoogleAgentRuntimeRevision).

Test files added/updated

• Added: tests/registry/input-set-git-context.test.ts — registry dispatch git param mapping for input_set get
• Updated: tests/tools/tool-handlers.test.ts — harness_get forwards git context for remote input sets
• Updated: tests/schemas/schema-bundle-contract.test.ts — v0 pipeline/template bundle includes DeployAwsAgentCoreRevision
• Updated: tests/tools/harness-schema-tool.test.ts — harness_schema resolves DeployAwsAgentCoreRevisionStepNode

Why these tests materially reduce regression risk

• The input-set bug was silent (runs succeeded with wrong inputs) — these tests assert the exact query params that prevent default-branch fallback.
• Schema sync PRs are automated and large; contract tests catch missing step definitions before agents construct invalid pipeline YAML.

Type of Change

• Other — test coverage

Checklist

• pnpm test passes (targeted: 184 tests in touched files)

  

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