* fix(history): join outer-whitespace raw text to the history of the prompt it saves (#438)
The Library stores text.strip() while a run keeps its exact raw text. The
history window, run detail scope id, newest pair run and prompt hints now
compare the raw text's stored form (one rule, utils/hashing.py, mirrored in
SQLite with the same code points). Hints also keep matching the exact raw
text, so older rows that kept outer whitespace stay hinted and protected.
* fix(history): join case-variant raw text to the history of the prompt it counts toward (#460)
The prompt hash folds case, so a run of "A Lighthouse" counts toward the
saved "a lighthouse" but never joined its history. History now compares the
hash's own key (prompt_key = strip + str.lower()); SQL calls Python for it
through pm_prompt_key/pm_prompt_hash registered on every managed connection,
since SQLite's lower() folds ASCII only. Hints match by text first (#438) and
fall back to the dedup hash only when no text matches, so no existing hint
becomes ambiguous. A history position from before this change still resumes.
* test(history): a real-host case-variant re-queue joins the prompt's history (#460)
The Library stores text.strip() while a run keeps its exact raw text. The
history window, run detail scope id, newest pair run and prompt hints now
compare the raw text's stored form (one rule, utils/hashing.py, mirrored in
SQLite with the same code points). Hints also keep matching the exact raw
text, so older rows that kept outer whitespace stay hinted and protected.
* fix(maintenance): keep titled and history-referenced prompts when pruning
prune_orphaned_prompts now also keeps prompts with a prompt_library_state
row (titled or explicit Library parents, whose state would cascade away)
and prompts that are the currently valid navigation hint of a recorded
run (execution_run_contexts positive/negative_prompt_id in the current
storage epoch whose exact raw snapshot text still matches). Stale hints
that history reads already ignore do not block pruning.
Fixes#237
* fix(maintenance): mirror unique-text hint rule and compute live hints once
The prune exempted a hinted prompt even when another prompt shared its
exact raw text, although history reads treat such a hint as dead. The
live-hint set now applies the reader's rule (current storage epoch, exact
raw text matching exactly one prompt, which is the hinted one) and lives
beside _prompt_hint in execution_contexts as LIVE_HINT_CTES.
The set is materialized once per statement and excluded with NOT IN, so
the prune no longer scans execution_run_contexts once per prompt. No
schema or index change.
Refs #237
Vito