feat(daemon): add filtering parameters to ListRuns API

[proboscis]

Summary

Adds server-side filtering parameters to the daemon's ListRuns API, enabling the daemon to handle all filtering logic instead of CLI/TUI performing client-side filtering.

Changes

New API Parameters (ListRunsRequest)

Parameter	Type	Description
issue_status	repeated IssueStatus	Filter runs by associated issue status (open/resolved/closed)
older_than	string	Filter by age: "7d", "2w", "1m", "3m", "6m", "1y"
agents	repeated string	Multi-value agent filter (overrides single agent if set)
tags	repeated string	Filter runs by associated issue tags
tags_mode	string	"and" = all tags must match, "or" = any tag matches (default: "and")

Files Modified

• api/orch.proto - Added new fields to ListRunsRequest
• api/orchpb/orch.pb.go - Regenerated protobuf code
• internal/store/store.go - Extended ListRunsFilter struct
• internal/daemon/proto_handler.go - Map proto fields to store filter
• internal/daemon/proto_client.go - Added ListRunsWithOptions method
• internal/store/file/run_index.go - Implemented filtering logic
• internal/orchapi/types.go - Extended client-side filter types
• internal/orchapi/daemon_client.go - Pass new fields to proto client

Testing

$ go build ./...
# Build passes

$ go test ./internal/store/file/... -v
# All store tests pass

$ go test ./internal/daemon/... -v  
# All daemon tests pass

Evidence

Build and unit tests pass. The existing integration test failures are pre-existing issues unrelated to this change (they involve agent session handling and path resolution).

Closes orch-383