In claim-db-worker/src/index.ts around lines 33 to 35, the code currently trusts
the x-agent header first and uses a non-null assertion for the rate-limit key
which can be null at runtime; instead, prefer the Cloudflare-provided IP
(cf-connecting-ip), then standard proxy headers like x-forwarded-for (taking the
left-most IP), then a controlled dev/testing override header (e.g.
x-dev-client-ip), and finally a safe default string (e.g. "unknown" or
"127.0.0.1"); remove the non-null assertion and build a validated key string
before calling env.CLAIM_DB_RATE_LIMITER.limit({ key }), ensuring you trim and
normalize the chosen header value so it cannot be empty and falls back to the
default.

In claim-db-worker/wrangler.jsonc around lines 27 to 29, the CLAIM_DB rate
limiter was reduced to 10 requests per 60 seconds which will break tests and
clients that assume higher throughput; update tests/test-rate-limits.sh to lower
TEST_COUNT to 10 or make TEST_COUNT configurable via env vars and default to
≤10, update any client integrations and documentation that reference >10 req/min
to reflect the new limit, and add a per-environment override (env var) or note a
staged rollout plan for workloads that need higher headroom.

In tests/test-rate-limits.sh around line 4, the script lacks strict shell
settings and uses unsafe loop/seq and unquoted variables; enable robust shell
behavior by adding at the top: set -euo pipefail and IFS=$'\n\t', then update
the loop to avoid unquoted seq and word-splitting (for example replace
constructs like for i in $(seq 1 $test_count) with for i in $(seq 1
"$test_count") or preferably a POSIX-safe while loop using a counter), and
ensure all variable expansions in the loop and commands are quoted (e.g.,
"$create_db_url" "$claim_db_url" "$agent_id") to satisfy shellcheck and prevent
word-splitting.

In tests/test-rate-limits.sh around lines 38 to 46, the curl call uses unquoted
variable expansions, repeats the x-Agent header, and writes to a fixed temp
path; fix it by removing the duplicate header, quoting all variable expansions
(e.g. "$AGENT_ID" and "$endpoint") to prevent word-splitting/globbing, create a
unique temp file with mktemp (e.g. tmp=$(mktemp)) and write curl output to that
quoted path, and add a trap to remove the temp file on exit to ensure safe
cleanup.

In tests/test-rate-limits.sh around line 65, the commented-out small sleep
("#sleep 0.05") should be re-enabled to throttle bursts; uncomment it and use a
portable short delay such as sleep 0.02–0.05 (e.g., sleep 0.02 or sleep 0.05) to
reduce request bursts during ad-hoc runs, or if sub-second precision is required
in the environment, replace with a portable usleep/timeout helper that sleeps
for 20–50ms.

In tests/test-rate-limits.sh around line 89, the example invocation only shows
production endpoints which may cause accidental load; add a local/miniflare
first so users see a safe default. Update the echo line to print a local example
(e.g., using localhost or miniflare URL and a local agent name) before the
existing production example, ensuring both examples are clearly separated and
labeled (local first, then production).

In claim-db-worker/src/index.ts around lines 40 to 53, the handler logs and
returns the client's raw IP and includes it in the JSON response (PII). Remove
the raw IP from logs and response: change console.log to only mention the rayId
(and any non-PII token), and remove the ip property from the returned JSON (or
replace it with a non-identifying generic key like clientTag if absolutely
required). Ensure headers and status remain unchanged and do not expose the IP
elsewhere in this block.

In create-db-worker/src/index.ts around lines 24 to 37, the 429 response path
currently logs and returns the client's IP and echoes it in the JSON body;
remove PII exposure by eliminating any use of clientIP in logs and the response
body, keep and log only the rayId for correlation, and update the JSON payload
to exclude the ip field while still returning status 429 and Content-Type
application/json; ensure any console logs reference only non-PII context (e.g.,
"Rate limit exceeded. Ray ID: {rayId}") and that clientIP is not stored or
returned.