Phase 1: Windows log collection + full-text search

Extends the agent, ingest, storage, api, and web with Windows Event
Log/ETW sourcing and Tantivy-backed free-text search, per the approved
Phase 1 plan.

- CLAUDE.md: materialized on disk (never existed as a file before) with
  a new Phase 1 "done looks like" section.
- agent: Windows Event Log (EvtSubscribe) and ETW sources, Windows
  service wrapper (install/uninstall/run-service), both feature- and
  target_os-gated so Linux builds/tests/clippy stay unaffected. Also
  fixed two pre-existing Phase 0 clippy gaps (dead-code on
  default-features-only builds, a type-inference edge case) found while
  testing every feature combination properly for the first time.
  UNVERIFIED on real Windows -- no Windows toolchain existed anywhere in
  the build environment; flagged prominently in three places.
- proto/ingest: new record_id field, assigned once server-side in
  ingest's gRPC front end so ClickHouse and Tantivy agree on the same ID
  for the same record.
- storage: record_id column + bloom filter index, verified against a
  live ClickHouse.
- search: new service, Tantivy index, rskafka consumer as an independent
  second consumer group on the same Redpanda topic ingest already reads.
- api/web: new /search endpoint and page, sharing the query page's
  result-table shape and component.
- hack/windows-fixture: sends realistic Windows-shaped data straight to
  ingest, so the pipeline's handling of it is verifiable without a
  Windows host.

Verified end-to-end on the live docker-compose stack: the same record_id
comes back from both /query and /search for the same log line, including
for windows-fixture's synthetic Windows Event Log data. Real bugs found
and fixed along the way: api/Dockerfile missing proto/ in its build
context, search's logs being completely silent (RUST_LOG gap), and
search/target/ missing from .gitignore/.dockerignore.

api/cmd/api/main.go

@@ -1,7 +1,7 @@
-// Command api is the Sentry Phase 0 query API: a single crude POST /query
-// endpoint proxying allowlisted SELECT statements to ClickHouse. See
-// internal/queryapi for why this is plain REST rather than the pinned
-// gRPC+gateway pattern for Phase 0.
+// Command api is Sentry's query API: POST /query (raw SQL, SELECT-only)
+// and POST /search (free-text, via the search service). See
+// internal/queryapi for why these are plain REST rather than the pinned
+// gRPC+gateway pattern.
 package main
 
 import (
@@ -17,6 +17,7 @@ import (
 
 	"github.com/sentry/sentry/api/internal/config"
 	"github.com/sentry/sentry/api/internal/queryapi"
+	"github.com/sentry/sentry/api/internal/searchclient"
 )
 
 func main() {
@@ -50,8 +51,15 @@ func main() {
 		os.Exit(1)
 	}
 
+	search, err := searchclient.Dial(cfg.SearchGRPCAddr)
+	if err != nil {
+		logger.Error("dialing search service", "error", err)
+		os.Exit(1)
+	}
+	defer search.Close()
+
 	exec := queryapi.NewExecutor(conn)
-	handler := queryapi.NewHandler(logger, exec, cfg.QueryTimeout, cfg.CORSAllowedOrigin)
+	handler := queryapi.NewHandler(logger, exec, search, cfg.QueryTimeout, cfg.CORSAllowedOrigin)
 
 	srv := &http.Server{
 		Addr:    cfg.HTTPListenAddr,