Serve lite mode without creating a KedroSession or DataCatalog

[jitu5]

Parent issue: #2265
Depends on: #2659, #2660, #2687

Update: Runtime graph cutover belongs to #2659, and #2715/#2716 restored the existing node IDs. No ID migration, stale-link warning, fixture regeneration, or forced static-site re-export is required.

Summary

Make kedro viz run --lite use the inspection provider without creating a KedroSession, building a DataCatalog or dataset objects, or populating the live data repositories.

Inspection still bootstraps project configuration and imports pipeline definitions. Reuse the existing lite_import_stubs() helper so inspection can work when optional project dependencies are missing.

Scope

• Short-circuit the live loader during --lite startup and install the inspection provider directly.
• Reuse the static node lookup added in Route node metadata and static export through the inspection adapter #2660; do not create a second metadata implementation.
• Keep resolved parameter values and typed --params overrides through the config loader.
• Keep configuration/file-backed fields such as styles and stats when they do not require dataset construction.
• Omit live-only preview fields cleanly instead of fabricating them.
• Serve task code/filepath when the upstream Kedro node-source field is available; otherwise omit those optional fields without failing.
• Define and test the lite-mode dataset_type contract. Raw catalog strings do not always match the existing frontend icon mapping, so either normalise supported types or explicitly document and test the generic-icon fallback.
• Preserve --env, --pipeline, --params, run-status, and static-export behaviour.
• Agree and test the behaviour of --lite --include-hooks (reject, warn/ignore, or another supported policy). Whatever is chosen, lite startup must not create a KedroSession.

Acceptance criteria

• Tests prove KedroSession, live load_data, DataCatalog/dataset construction, and live repository population are not called in lite mode.
• /api/main, valid pipeline views, /api/nodes/{id}, and /api/run-status remain coherent and use the same IDs as full mode.
• Parameter values and typed runtime overrides are available in lite mode.
• A project with missing optional dependencies can be inspected through lite_import_stubs().
• Unknown pipeline and node IDs return 404.
• Preview fields that require live objects are absent rather than misleading.
• Dataset type/icon behaviour is explicit and covered for Plotly, Matplotlib, and a normal dataset.
• The agreed --include-hooks behaviour is documented and tested.
• Static export works from the provider in lite mode.