Split override templates into a light index and a per-template detail tool

[92Infinitus92]

get_override_templates returned every template in full: properties, PDA layout, the whole constant catalog, and a ~160KB IDL inlined per template. An agent had to load all of that just to see what was available.

This splits it in two:

• get_override_templates now returns a light index - id, name, description, protocol, account type, tags, and a hasLlmContext flag. No properties, no IDL, no inlined options.
• get_override_template(templateId) returns one template's full detail, with each constant summarized as {label, description, optionsCount} instead of the raw option list.

The flow is index → pick → detail → search_constant_options for a concrete value → create_scenario, and the guidance text walks the model through that order.

Stacked on #3 (base feat/pump-protocol); I'll retarget to develop once that merges.

Greptile Summary

The PR splits override-template discovery into a lightweight index and a separate full-detail lookup.

• Adds get_override_template(templateId) with validation for unknown IDs.
• Makes the existing tool and MCP resource return lightweight index entries.
• Updates tool guidance and tests for the index → detail → constant search → scenario flow.

Confidence Score: 5/5

The PR appears safe to merge because no blocking failure remains.

No blocking failure remains.

Important Files Changed

Filename	Overview
crates/mcp/src/surfpool/mod.rs	Adds the per-template detail tool, converts template listings to lightweight index responses, updates guidance, and tests the new flow.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart LR
    A[get_override_templates] --> B[Pick templateId]
    B --> C[get_override_template]
    C --> D[search_constant_options]
    D --> E[create_scenario]

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[92Infinitus92]

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