feat: add analyst recommendations, fix agent turn logic, remove legacy dirs

Lucky/Prudence agents:
- add _strip_leading_addressee_prefixes() to prevent double-addressee format (e.g. "Lucky: Prudence: ...")
- reset per-turn state flags at start of fresh user question to prevent duplicate consecutive utterances
- restore peer reaction path so agents reliably respond to each other

Financial agent (Finn):
- add RECOMMENDATIONS_QUERY intent with Finnhub stock/recommendation endpoint
- add _has_recommendations_intent() and _format_recommendations_response() helpers
- add hard guardrail in utterance_handler.py and mcp_server.py so analyst/rating queries never fall back to price quote

Housekeeping:
- remove all openfloor-old directories across both agents and shared libs

Signed-off-by: Deborah Dahl <dahl@conversational-technologies.com>

Author: dadahl