docs: A7.L1 session bookkeeping — close #190, update #93/#189, file #191

- #190 (interior entity id overflow) moved to Recently closed with full
  evidence trail — found + fixed same session as #189's investigation.
- #189 (missing particles) updated: root cause was #190's id aliasing,
  not the light-carrier hydration fix itself; fix shipped but the
  fountain's water spray hasn't been re-confirmed visually yet (session
  moved to an FPS question, then a movement bug, before circling back).
  The "candle" identification sub-thread stays open regardless.
- #93 (indoor lighting umbrella) updated earlier this session with the
  two A7.L1 root causes + fixes; #80/#94 still need re-verification
  before it can close.
- #191 filed: tapping W briefly glides forward without playing the step
  animation (retail: single visible step). Different subsystem
  (movement/animation, not rendering) — not investigated this session,
  filed to keep it from interrupting A7 lighting/particle work.
- Roadmap Phase A7 progress note added earlier this session.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

docs/plans/2026-04-11-roadmap.md

@@ -293,6 +293,23 @@ successfully 2026-04-30 for the steep-roof case. Matching binaries
 
 #### Phase A7 — Indoor lighting fidelity (RenderDoc + retail-decomp driven)
 
+**A7.L1 progress (2026-07-09, `d275ed55` + `9ebb2060`):** the Town Network
+"fountain room too dark" report (#79/#93 umbrella) is root-caused to TWO
+distinct bugs, both fixed and user-confirmed improved ("lightning is
+better"): (1) `BuildPointLightSnapshot`'s player-nearest cap had no
+visibility filter — in a 463+ fixture hub, wall-disconnected-but-Euclidean-
+closer fixtures could out-rank a visible room's own torches; scoped
+candidacy to last frame's rendered visible-cell set. (2) THE bigger fix: the
+mesh-empty hydration gate dropped an entity's ENTIRE registration — Setup
+Lights included — whenever its visual mesh flattened to zero parts (a
+mesh-less "light attach point" carrying only a Light, common dat pattern);
+fixed via `EntityHydrationRules.ShouldKeepEntity`. Dungeon-wide effect:
+registered lights 498→892 on the same launch. NOT closing A7 yet — #80
+(2nd floor) and #94 (held-item spotlight) weren't re-verified this session,
+and #189 (missing fountain/candle particles, found in the same room,
+confirmed NOT the same root cause) is a fresh open thread. Full detail in
+ISSUES.md #93 + AP-85 in the divergence register.
+
 **Now also owns #176/#177 (2026-07-06):** the Facility Hub purple seam
 flash + stair-room light pop-in are ROOT-CAUSED to this phase's "light
 visibility culling" layer — a camera-nearest `MaxGlobalLights=128`