fix(movements): read a query's pages as one answer and keep a partial one

- Each page was cached on its own, so a multi-page answer could join
  pages read at different times from a feed that gains rows at the top,
  repeating some rows and missing others. A query's pages are now read
  together and cached as one entry.
- A failed later page threw away the pages already read. They are now
  returned with incomplete saying why, and not cached.
- The library did not cap pages at MAX_PAGES itself; it clamps now.
- The hint said to raise --pages even at 10; at 10 it says to narrow the
  dates. -o jsonl, which streams rows only, gives the hint on stderr.
- A duplicate match arm in the CLI was dead; it is gone.

Claude-Session: https://claude.ai/code/session_01RqPPVeVDrnLoP7NUZmLRxY

crates/idx-mcp/tests/golden/tools.json

@@ -556,7 +556,7 @@
     "name": "get_quotes"
   },
   {
-    "description": "Reported changes in insiders' and major holders' stakes in IDX stocks, from the user's own Stockbit session, newest first: IDX insider disclosures (directors, commissioners and other insiders, any size, with the trade price) and KSEI changes of holders at 5% and above (price estimated: `price_estimated`). One stock's, or the market's without `symbol`. Shares are exact and signed (`shares_change` < 0 is a sale); percentages are basis points as Stockbit rounds them, so a small insider can read 0. `more` is true when rows remain past `pages`. These are filings, not signals: many insiders buying at one price on one day is usually a share plan, and rows appear days after the change. AUTHERROR means there is no session: call stockbit_status, then stockbit_login.",
+    "description": "Reported changes in insiders' and major holders' stakes in IDX stocks, from the user's own Stockbit session, newest first: IDX insider disclosures (directors, commissioners and other insiders, any size, with the trade price) and KSEI changes of holders at 5% and above (price estimated: `price_estimated`). One stock's, or the market's without `symbol`. Shares are exact and signed (`shares_change` < 0 is a sale); percentages are basis points as Stockbit rounds them, so a small insider can read 0. `more` is true when rows remain past `pages`; `incomplete`, when present, says a later page failed and the rows are those read before it (retry later for the rest). These are filings, not signals: many insiders buying at one price on one day is usually a share plan, and rows appear days after the change. AUTHERROR means there is no session: call stockbit_status, then stockbit_login.",
     "inputSchema": {
       "$schema": "https://json-schema.org/draft/2020-12/schema",
       "properties": {