[AZ-505] Cycle 6 Steps 15-16 perf + deploy report

Step 15 (Performance Test): 8/8 PT scenarios PASS in a single
default-parameter run (exit 0). Adapts scripts/run-performance-tests.sh
for the new TLS+ALPN dev listener via CURL_OPTS=(--cacert ./certs/api.crt).
Report at _docs/06_metrics/perf_2026-05-12_cycle6.md. The clean exit-0
satisfies the cycle-3 perf-harness leftover deletion criterion that
carried across cycles 3-5; leftover file deleted.

Step 16 (Deploy): _docs/03_implementation/deploy_cycle6.md captures the
shipping payload (inventory endpoint, HTTP/2 TLS+ALPN, tiles_leaflet_path
covering index, migration 015), the dev-cert plumbing for local-docker +
integration-tests parity, the production-TLS topology note (terminate at
ingress; never promote the dev cert), and the operator runbook for
promoting cycle-6 past dev.

NU1902 / CA2227 / ASPDEPR002 / Serilog-10.x re-listed as carry-overs
unchanged; admin-team iss/aud confirmation unchanged.

State advanced to Step 17 (Retrospective).

Co-authored-by: Cursor <cursoragent@cursor.com>

_docs/_autodev_state.md

@@ -2,8 +2,8 @@
 
 ## Current Step
 flow: existing-code
-step: 14
-name: Security Audit
+step: 17
+name: Retrospective
 status: not_started
 sub_step:
   phase: 0