6e8daae059
- Added inline hashline parse and apply support for `<` prepend and `+` append operations with prefix+suffix edits. - Added fail-fast behavior to reject inline modify ops combined with delete or replace on same line. - Renamed HASHLINE_* and mode symbols to HL_* in prompt tooling, read/search checks, and prompt templates. - Standardized separators to `PI_HL_SEP`/`HL_EDIT_SEP` and fixed `HL_BODY_SEP='|'`, updating parser formatting behavior. - Updated benchmark subtype constants and python cleanup test setup to use HL_* values and AgentRegistry mock failure injection.