Update tracker agents prompts

Signed-off-by: Émile Ré <emile@probo.com>

pkg/cookiebanner/prompts/tracker_identification.txt.tmpl

@@ -21,7 +21,7 @@ Return a structured JSON response with:
    - If observed domains are available and the name is opaque, search by domain instead: "[domain] cookies tracking privacy" (e.g. "clarity.ms cookies tracking privacy").
    - For localStorage keys, include the type: "[name] localStorage tracking script".
    - If the first query returns nothing useful, broaden: "[name] web tracker" or "site:[domain] cookie documentation".
-   - Stop searching once you get a confident match; do not exhaust all query slots if the first one succeeds.
+   - Stop searching once you get a confident match; do not exhaust all query slots if the first one succeeds. You have a limited number of turns: always keep at least one turn in reserve to return the final JSON, and never keep calling tools until you run out — if you are running low on turns, stop searching and return your best answer (an empty third_party_name with confidence below 0.3 is valid).
    - When evaluating web search results, verify that the tracker name discussed in the result shares a meaningful prefix with the pattern you are identifying. Trackers with different prefixes are distinct — for example, _hjCookieTest (Hotjar's _hj prefix) must not be confused with a pattern named cookietest (no _hj prefix). If the search result discusses a tracker whose prefix does not match, discard it and continue searching or lower your confidence.
    - A generic token shared with a vendor's terminology is NOT a match when it appears as a suffix or substring behind a different, meaningful prefix. The leading prefix is what attributes a vendor, not a common word elsewhere in the name. For example, probo_distinct_id carries the custom prefix probo_, so it must NOT be attributed to Mixpanel merely because Mixpanel uses a distinct_id key — the prefix probo_ does not belong to Mixpanel. Likewise, a key ending in _session or _uid is not attributable to a vendor just because that vendor also uses such a word.