fix: broken example code, incorrect docs, and typos

[golldyck]

Problem

The examples/run_historical.sol file cannot compile due to 5 errors: wrong import path, non-existent function name, undefined variable, missing struct field, and undeclared state variables. The README.md has matching errors plus missing memory keywords and broken links.

Fix

Corrected all compilation errors in the example contract, fixed README code snippets to match the actual interface definitions, and fixed NatSpec typos in the interface files. Removed a redundant uint32 >= 0 gas-wasting check in TensorLib.

Changes

• examples/run_historical.sol — Fixed import path (../lib/ → ../src/lib/), renamed runHistoricalInference → runInferenceOnPriceFeed, fixed input_query → input, added candle_duration_in_mins field, declared results and resultNumber variables
• README.md — Fixed function names, added missing struct fields, added memory keyword to struct assignments, prefixed URLs with https://
• src/interfaces/OGInference.sol — Fixed NatSpec typo "OGInfernece" → "OGInference"
• src/interfaces/OGHistorical.sol — Fixed copy-paste NatSpec "OGInference" → "OGHistorical"
• src/lib/TensorLib.sol — Removed redundant uint32 >= 0 check

Testing

• Verified examples/run_historical.sol compiles without errors
• Confirmed all function names and struct fields match src/interfaces/ definitions
• Checked README examples are consistent with the fixed code

Closes #4

[golldyck]

Hi @adambalogh @kylexqian — this PR fixes bugs I found during a full audit of OpenGradient's public repositories. Would appreciate a review when you get a chance. Happy to address any feedback. Thanks!