OpenSystemsDevelopment / qpdf

…logic, and replace redundant code with subscript operators.

…lify `withinLimits` logic, and improve code readability with subscript operators.

…` and `getArrayNItems` with subscript operators for readability and cleaner syntax.

…edundant debug traces.

…and improve `findInternal` readability.

Implement subscript operators (`operator[]`) to provide indexed access to `QPDFObjectHandle` for both `size_t` and `int` types.

…otations in page objects

- Repair invalid or missing Resources in page object trees with warnings
- Remove invalid Annots arrays with warnings
- Warn about duplicate annotations
- Update test cases and output to reflect new error handling.
- Improve robustness for annotation and resource validation.

…`, and simplify member access.

…logic in call to `initializeSpecialStreams`.

…mplify control flow, and update method returns.

…lize type conversions, and improve clarity across multiple modules.

…jectHelper`: replace `getArrayNItems` with `size`, simplify array traversal, and centralize `empty` checks for improved clarity and efficiency.

…mplify array traversal, and centralize `empty` checks for improved clarity and efficiency.

…roduce `empty` checks, and use `std::cmp_less` and `emplace_back` for better clarity and efficiency.

…ize`, and centralize `empty` checks.

Refactor array handling in `QPDFObjectHandle`: replace `int` with `size_t` for size and index operations, introduce utility functions for type conversions, and simplify sparse array logic.

…`warn`, streamline condition handling.

… warnings, and centralize utility methods.

… pipelines and simplify conditions.

Introduce null checks for `callbacks` in `QPDFObjectHandle` to allow content streams to be parsed without ParserCallbacks. Update `QPDFJob` to pass `nullptr` instead of `DiscardContents` for parsing.

…or deterministic ID generation (fixes #1235).

…ity, and replace deprecated API usage.

…ace manual index handling, revise min/max initialization to use `std::numeric_limits`, and optimize shared identifier assignments.

… numbers and related variables, replacing `int`, to enhance consistency and avoid unnecessary checked conversions.

…r,  and revise enum initialization. Clean up unused error handling in linearization logic.

…evel` and add `const&` to `child` parameter.

…bnail processing loop to ensure consistency.

…uring robustness against damaged PDFs.

…eams, improving robustness against damaged PDFs.

Refactor Pl_Base64

…oding/decoding logic, and simplify usage in `JSON_writer` and `QPDF_json`.

…view` for encoding/decoding, improving memory efficiency and simplifying buffer management

…e` and `finish` logic

…cing buffered reads with direct data extraction from `InputSource`.

…dding error counting and leveraging `reconstructed_xref` for improved robustness, limiting the acceptable number of errors for damaged files.

Ensure an appearance stream is not shared  before generating text appearances, improving error handling and data integrity.