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.

search/Cargo.toml

@@ -0,0 +1,33 @@
+[package]
+name = "sentry-search"
+version = "0.1.0"
+edition = "2021"
+license = "AGPL-3.0-only"
+description = "Sentry Tantivy-backed full-text search service"
+
+[[bin]]
+name = "sentry-search"
+path = "src/main.rs"
+
+[dependencies]
+tokio = { version = "1", features = ["rt-multi-thread", "macros", "fs", "sync", "signal", "time"] }
+tonic = "0.12"
+prost = "0.13"
+
+tantivy = "0.22"
+rskafka = "0.6"
+
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+
+anyhow = "1"
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+
+[build-dependencies]
+tonic-build = "0.12"
+
+[dev-dependencies]
+# Already in the dependency graph transitively (tantivy/tonic-build both
+# pull it in); promoted to a direct dev-dependency for test use.
+tempfile = "3"