Bug: examples/run_historical.sol does not compile (5 errors)

[golldyck]

Problem

The examples/run_historical.sol file cannot be compiled due to 5 separate errors. Any developer trying to use this example as a starting point will be blocked immediately.

Steps to Reproduce

1. Clone the solid-ml repository
2. Attempt to compile examples/run_historical.sol
3. Compilation fails

Errors Found

1. Wrong import path — ../lib/TensorLib.sol should be ../src/lib/TensorLib.sol
2. Non-existent function call — runHistoricalInference should be runInferenceOnPriceFeed (per src/interfaces/OGHistorical.sol)
3. Undefined variable — input_query on line 50 should be input (the local variable declared on line 38)
4. Missing struct field — HistoricalInputQuery requires candle_duration_in_mins but it is omitted in both struct constructions
5. Undeclared state variables — results and resultNumber are used but never declared

Additional Issues

• README.md examples have the same function name and struct field errors
• README.md struct assignments missing memory keyword (TensorLib.Number prediction → TensorLib.Number memory prediction)
• README.md links missing https:// protocol (hub.opengradient.ai → https://hub.opengradient.ai)
• NatSpec typo "OGInfernece" in src/interfaces/OGInference.sol
• Copy-paste error in src/interfaces/OGHistorical.sol NatSpec ("OGInference" → "OGHistorical")
• Redundant uint32 >= 0 check in src/lib/TensorLib.sol wastes gas (unsigned integers are always >= 0)

Environment

• Solidity compiler: 0.8.20+
• Foundry/Hardhat: any version