Add SSI import repair planning task

[chubes4]

Summary

• Adds a ssi_import_repair_plan system task for sandbox-local Static Site Importer diagnostics repair planning.
• Parses fallback block, unresolved asset, broken link, and conversion diagnostics into a structured plan/summary without writing files or mutating the host site.
• Validates source-tree scope and refuses destructive or out-of-root requested edits.

Closes #2381

Tests

• php tests/ssi-import-repair-plan-smoke.php
• ./vendor/bin/phpcs inc/Engine/AI/System/Tasks/SSIImportRepairPlanTask.php inc/Engine/AI/System/SystemAgentServiceProvider.php tests/ssi-import-repair-plan-smoke.php
• php -l inc/Engine/AI/System/Tasks/SSIImportRepairPlanTask.php
• php -l inc/Engine/AI/System/SystemAgentServiceProvider.php
• php -l tests/ssi-import-repair-plan-smoke.php

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode (openai/gpt-5.5)
• Used for: Drafted the system task implementation, smoke coverage, and PR description; Chris remains responsible for review and testing.

[homeboy-ci]

Homeboy Results — data-machine

Lint

❌ lint — failed

ℹ️ Auto-fix: homeboy lint data-machine --path /home/runner/work/data-machine/data-machine --changed-since b95cb35 --fix (or homeboy refactor data-machine --path /home/runner/work/data-machine/data-machine --changed-since b95cb35 --from lint --write)
ℹ️ Some issues may require manual fixes
ℹ️ Full options: homeboy docs commands/lint
Deep dive: homeboy lint data-machine --changed-since b95cb35

Artifacts and drill-down

• CI results artifact: homeboy-ci-results-data-machine-lint-quality-Linux-node24 contains immediate command JSON for this action invocation.
• Observation artifact: homeboy-observations-data-machine-lint-quality-Linux-node24 contains exported Homeboy run history for deeper queries.
• Drill-down: download the observation artifact, then run homeboy runs import <dir>, homeboy runs list, and homeboy runs findings <run-id>.
• Artifacts are attached to the workflow run: https://github.com/Extra-Chill/data-machine/actions/runs/26694868596

Test

✅ test — passed

ℹ️ Auto-fix lint issues: homeboy refactor data-machine --from lint --write
ℹ️ Collect coverage: homeboy test data-machine --coverage
ℹ️ Pass args to test runner: homeboy test -- [args]
ℹ️ Full options: homeboy docs commands/test
Deep dive: homeboy test data-machine --changed-since b95cb35

Artifacts and drill-down

• CI results artifact: homeboy-ci-results-data-machine-test-quality-Linux-node24 contains immediate command JSON for this action invocation.
• Observation artifact: homeboy-observations-data-machine-test-quality-Linux-node24 contains exported Homeboy run history for deeper queries.
• Drill-down: download the observation artifact, then run homeboy runs import <dir>, homeboy runs list, and homeboy runs findings <run-id>.
• Artifacts are attached to the workflow run: https://github.com/Extra-Chill/data-machine/actions/runs/26694868596

Audit

✅ audit — passed

• requested_detectors — 11 finding(s)
• intra-method-duplication — 9 finding(s)
• dead_code — 3 finding(s)
• Directives — 1 finding(s)
• Retention — 1 finding(s)
• Total: 25 finding(s)

Deep dive: homeboy audit data-machine --changed-since b95cb35

Artifacts and drill-down

• CI results artifact: homeboy-ci-results-data-machine-audit-quality-Linux-node24 contains immediate command JSON for this action invocation.
• Observation artifact: homeboy-observations-data-machine-audit-quality-Linux-node24 contains exported Homeboy run history for deeper queries.
• Drill-down: download the observation artifact, then run homeboy runs import <dir>, homeboy runs list, and homeboy runs findings <run-id>.
• Artifacts are attached to the workflow run: https://github.com/Extra-Chill/data-machine/actions/runs/26694868596

Tooling versions

• Homeboy CLI: homeboy 0.210.0+4b2873bf
• Extension: wordpress from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: d46af358
• Action: unknown@unknown

[chubes4]

Closing because this implements the wrong ownership boundary. Data Machine core must not know about Static Site Importer repair semantics; Studio Web should inject its own sandbox MU plugin/task into Codebox and use Data Machine only as a generic runtime ingredient.