[Bug] Legacy models perform poorly on searchable scientific queries

**Bug Description**
legacy models are ineffective at answering Googlable science; Claude is basically un-useable for routine research

**Environment Info**
- Platform: win32
- Terminal: windows-terminal
- Version: 2.1.114
- Feedback ID: 319de1bd-3597-4f61-b0f3-33a4ca0e95dd

**Errors**
```json
[{"error":"Error: pdftoppm failed: Command 'pdftoppm' not found or is in an unsafe location (current directory)\n at yD_ (B:/~BUN/root/src/entrypoints/cli.js:4778:764)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-09-13T19:23:01.654Z"},{"error":"Error: pdftoppm failed: Command 'pdftoppm' not found or is in an unsafe location (current directory)\n at yD_ (B:/~BUN/root/src/entrypoints/cli.js:4778:764)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-09-13T19:23:02.350Z"},{"error":"Error: pdftoppm failed: Command 'pdftoppm' not found or is in an unsafe location (current directory)\n at yD_ (B:/~BUN/root/src/entrypoints/cli.js:4778:764)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-09-13T19:23:03.077Z"},{"error":"Error: File does not exist. Note: your current working directory is C:\\Users\\tvanw\\OneDrive\\Business\\Genesys_2025\\Funding\\Applications\\NIAID_SBIR_Analysis\\STTR_NIAID.\n at call (B:/~BUN/root/src/entrypoints/cli.js:4783:7630)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-09-13T19:23:33.886Z"},{"error":"Error: File does not exist. Note: your current working directory is C:\\Users\\tvanw\\OneDrive\\Business\\Genesys_2025\\Funding\\Applications\\NIAID_SBIR_Analysis\\STTR_NIAID.\n at call (B:/~BUN/root/src/entrypoints/cli.js:4783:7630)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-09-13T19:23:34.234Z"},{"error":"Error: File does not exist. Note: your current working directory is C:\\Users\\tvanw\\OneDrive\\Business\\Genesys_2025\\Funding\\Applications\\NIAID_SBIR_Analysis\\STTR_NIAID.\n at call (B:/~BUN/root/src/entrypoints/cli.js:4783:7630)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-09-13T19:23:34.609Z"},{"error":"Error: File does not exist. Note: your current working directory is C:\\Users\\tvanw\\OneDrive\\Business\\Genesys_2025\\Funding\\Applications\\NIAID_SBIR_Analysis\\STTR_NIAID.\n at call (B:/~BUN/root/src/entrypoints/cli.js:4783:7630)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-09-13T19:23:34.930Z"},{"error":"MaxFileReadTokenExceededError: File content (29511 tokens) exceeds maximum allowed tokens (25000). Use offset and limit parameters to read specific portions of the file, or search for specific content instead of reading the whole file.\n at hD_ (B:/~BUN/root/src/entrypoints/cli.js:4774:12571)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-09-13T19:24:21.864Z"}]
```

Reproduce the reported searchable-science workflow on Windows with version 2.1.114, using the recorded pdftoppm and missing-file errors as the starting point. Check how the CLI handles PDF conversion, working-directory paths, and oversized files; done means the workflow no longer produces these errors and the model behavior is separately characterized.

索引モデルが issue の本文から書いたものです。