Add Lightning Rod provider and Foresight v4 model

[bartolomej]

Add Lightning Rod Labs provider with Foresight v4

Summary

• Add providers/lightningrod/ with provider metadata and Foresight v4 model definition

What was added

• providers/lightningrod/provider.toml — OpenAI-compatible provider at https://api.lightningrod.ai/v1/openai
• providers/lightningrod/models/foresight-v4.toml — specialized AI forecasting model

Data source

• https://www.lightningrod.ai/models
• https://docs.lightningrod.ai

Validation

• Ran: bun validate
• Result: passes

[github-actions]

Action items

• [critical] [violation] providers/lightningrod/models/foresight-v4.toml:1 - Check: ModelBase (packages/core/src/schema.ts:217) requires a non-empty description string for every provider model authored inline (without base_model). Why: The new TOML omits description, so AuthoredModel.safeParse in generate.ts will throw "Required" for this field and bun validate will exit non-zero, contradicting the PR body's "Result: passes" claim. Every inline provider model in the repo includes this field (e.g. providers/stepfun-step-plan/models/step-router-v1.toml:2, providers/bailing/models/Ring-1T.toml:2). Action: Add a description = "..." line directly after name with a concise, non-empty model description.
• [low] [possible mistake] providers/lightningrod/models/foresight-v4.toml:6 - Check: reasoning_options must reflect the provider's actual API surface, and data-changing PRs should map each citation to the specific claim it supports. Why: The PR declares effort with ["low", "medium", "high"] for a niche provider, but the PR body's two URLs (https://www.lightningrod.ai/models, https://docs.lightningrod.ai) are not mapped to specific claims, so the reasoning_effort support, accepted values, pricing, and limits cannot be reviewed from the PR. Action: Cite the specific documentation page that confirms Lightning Rod's reasoning_effort parameter and its accepted values (and the cost/limit figures), or set reasoning_options = [] if no caller control is verified.