v0.2.0

Added

• New crate borsa-types for shared domain types and reports used across the
  workspace (configuration, connector keys, attribution, and report envelopes).
• Unified routing policy for provider and exchange ordering:
  • borsa-types::routing_policy::{RoutingPolicy, RoutingPolicyBuilder} with
    composable global/kind/symbol/exchange rules and an optional strict flag.
  • Exchange preferences are used for search de-duplication (Symbol > Kind > Global).
• BorsaConnector::key() helper for typed connector keys when building policies.
• BorsaError::StrictSymbolsRejected to surface strict policy exclusions in streaming.
• Full serde support for BorsaConfig enums and ConnectorKey to enable config-as-data.

Breaking Change

• Router download API redesigned for clarity and richer context:
  • DownloadResponse.history: HashMap<Symbol, HistoryResponse> replaced by
    DownloadResponse.entries: Vec<DownloadEntry> where each entry includes the
    instrument and its history.
  • Tests updated to assert over entries instead of map lookups.
• Unified error moved to borsa-types::BorsaError and now derives Serialize/Deserialize.
  • Capability fields on BorsaError::{Unsupported,ProviderTimeout,RequestTimeout,AllProvidersTimedOut}
    are now String instead of &'static str.
  • Report envelopes (InfoReport, SearchReport, DownloadReport) change warnings
    from Vec<String> to Vec<BorsaError> and propagate structured errors instead of strings.
• borsa-core::error module removed; import BorsaError via borsa_core::types::BorsaError.
• Builder APIs prefer_for_kind(...) and prefer_symbol(...) were removed and
  replaced by a unified routing_policy(...) configuration built with
  RoutingPolicyBuilder. Update builder calls and tests accordingly.
• borsa-yfinance: YfConnector::KEY constant is replaced by BorsaConnector::key()
  or YfConnector::key_static() for constructing typed keys.

Changed

• Moved configuration (BorsaConfig, BackoffConfig), fetch/merge strategies,
  connector key, and attribution/span types into borsa-types and re-exported
  them from borsa/borsa-core.
• Routers now preserve connector-tagged errors in report warnings.
• router/history: attribution is now derived from the merged timeline using
  first-wins per timestamp; spans group contiguous provider segments regardless
  of cadence gaps for clearer provenance.
• examples: switch fixed epoch timestamps to recent 00:00 UTC dates for
  readability and stability across runs; compute daily candle counts explicitly.
• examples: implement supports_kind on mock connectors to match the current
  connector trait.
• quote routing: enforce instrument exchange on successful quotes; exchange
  mismatch is treated as NotFound to enable priority fallback/latency racing.
• search: de-duplicate cross-provider results by symbol using configured
  exchange preferences (Symbol > Kind > Global) while preserving traversal order.
• streaming: assign symbols per provider subset based on routing policy and drop
  updates for unassigned symbols; strict rules can proactively reject symbols.
• BorsaConfig now carries a unified routing_policy and is fully
  Serialize/Deserialize for external configuration.

Fixed

• router/history: avoid fragmented or misleading attribution when providers have
  gaps or differing cadences by building runs on the global merged sequence.

Removed

• Deleted borsa/src/attrib.rs; attribution types now live in borsa-types.
• Deleted borsa-core/src/error.rs; error type lives in borsa-types.

Dependencies

• Bump paft to v0.6.0.
• Bump yfinance-rs to v0.6.0.