feat(core): add read-only progress diagnostics (#1060)

[shaun0927]

Closes #1060.

Directionality / overlap check

• Builds on existing ProgressTracker and activity-tracker telemetry instead of adding a new autonomous harness loop.
• Read-only and advisory only: no stop, retry, checkpoint restore, navigation, browser action, or LLM call is executed by this tool.
• Checked current open PRs before implementation; no open PR adds an oc_progress_status surface or equivalent anti-wandering diagnostic endpoint.

Summary

• Adds oc_progress_status with structured progressing | stalling | stuck diagnostics.
• Reports bounded counters for repeated errors, non-progress streaks, screenshot loops, coordinate-click streaks, repeated tool calls, and two-tool oscillation.
• Returns capped advisory next-call hints such as refresh_state, switch_strategy, checkpoint_and_recover, or stop_episode without performing those actions.
• Redacts sensitive recent-call argument summaries when includeRecentCalls is requested.
• Keeps the tool available during unhealthy sessions by skipping session initialization and treating it as state-stable/high-frequency.

Verification

• npm test -- --runInBand tests/tools/oc-progress-status.test.ts
• npm run lint:changed
• npm run build (after npm install to restore yaml from current develop dependencies)

Merge-after validation with OpenChrome

1. Start OpenChrome MCP and perform three observation-only calls (read_page, tabs_context, computer screenshot), then call oc_progress_status({ includeRecentCalls: true }); expect status: "stalling", redacted compact call summaries, and suggestedPolicy: "refresh_state".
2. Perform three failed stale-ref interactions, then call oc_progress_status; expect status: "stuck", consecutiveErrors >= 3, and suggestedPolicy: "checkpoint_and_recover".
3. Perform three repeated coordinate clicks without a DOM/ref-based action, then call oc_progress_status; expect coordinateClickStreak >= 3, topSignal.rule: "coordinate-click-stall", and suggestedPolicy: "switch_strategy".
4. Confirm none of the above calls closes tabs, restores checkpoints, retries actions, or mutates browser state beyond recording the diagnostic call itself.

Not tested

• Live browser smoke was not run in this worktree; the PR includes deterministic unit coverage for the same scenarios.

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