* feat: accept pdf, images and office files
* refactor: rename FileConverter to FileParser, simplify file retain API
- Rename engine/converters/ → engine/parsers/, FileConverter → FileParser,
ConverterRegistry → FileParserRegistry, MarkitdownConverter → MarkitdownParser
- Rename env var HINDSIGHT_API_FILE_CONVERTER → HINDSIGHT_API_FILE_PARSER
- Remove async/document_tags params from FileRetainRequest (always async now)
- Add retain_files() to Python Hindsight client and retainFiles() to TypeScript client
- Add sample.pdf to doc examples for working file upload demonstrations
- Update test_file_retain.py to use new parser names and always-async behavior
- Fix Go client missing os import in api_files.go
- Simplify postgresql.py storage to minimal schema
* fix: update rust CLI tests to use is_supported_file instead of is_text_file
* fix: patch Go api_files.go to add missing 'os' import after generation
* fix: insert 'os' import after 'net/url' in api_files.go patch for correct position
* chore: regenerate OpenAPI spec and clients (converter→parser description update)
* Fix Python SDK not sending Authorization header
The Python SDK accepts an api_key parameter but never sends it as a
Bearer token in requests. The OpenAPI-generated Configuration class
stores the key in access_token, but auth_settings() returns an empty
dict because the OpenAPI spec doesn't define a security scheme.
This fix manually sets the Authorization header on the ApiClient,
bypassing the broken auth_settings() mechanism.
Tested against api.dev.hindsight.vectorize.io:
- Before: 401 "Authentication failed: API key required"
- After: Success
* chore: update Rust client Cargo.lock for CI verification
Run generate-clients.sh to sync Cargo.lock with current dependencies.
