fix: run advertised sync_accounts in storyboards

[sangilish]

Summary

• Narrow the storyboard runner's explicit-account sync_accounts skip so it only applies when the agent does not advertise sync_accounts.
• Keep existing not_applicable cascade behavior for explicit-mode sellers that omit the tool.
• Add a regression proving explicit-mode sellers that do advertise sync_accounts actually run the step.
• Add a patch changeset.

Fixes #2303.

Validation

• npm run build:lib
• NODE_ENV=test node --test-timeout=60000 --test test/lib/storyboard-cascade-skip-on-skip.test.js
• NODE_ENV=test node --test-timeout=60000 --test test/server-decisioning-capability-projections.test.js
• git diff --check
• pre-push validation: format check, typecheck, build:lib

[aao-ipr-bot]

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Use discovered tools in the sync_accounts gate

When runStoryboardStep() is used without an explicit agentTools option, it still discovers the agent profile and stores it in options._profile, but it does not copy _profile.tools into options.agentTools. In that standalone-step path, an explicit-mode seller that advertises sync_accounts in discovery is treated as not advertised here and the step is skipped as not_applicable, so the new behavior only works for full storyboard runs or callers that redundantly pass agentTools. Use the existing _profile.tools fallback (e.g. resolveAdvertisedTools(options)) for this check.

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[bokelley]

Reviewed the runner change and regression coverage. The new behavior is scoped correctly: explicit-account sellers still get marked not_applicable when they do not advertise the tool, but sellers that explicitly advertise now run the step. Full CI is green and the patch changeset is present.