feat(web): add incremental modifier reader batch

docs/status/WBV2-P1152-000.md

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+# WBV2-P1152-000 status
+
+- task: `WBV2-P1152-000`; parent: `WBV2-P1151-001`; status: `done`
+- taskClass: `QUEUE_ENABLEMENT`; no modifier-family parity completion claimed
+- source-backed batch authorized: `MODIFIER_READER_BATCH_SIX` (12 units)
+- dynamic inventory: `3745` units; verified `442`; unverified `3303`; bound delta `0`
+- nextTask: `WBV2-P1152-001`

docs/status/WBV2-P1152-001.md

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+# WBV2-P1152-001 status
+
+- task: `WBV2-P1152-001`; module: `MODIFIER_READER_BATCH_SIX`; status: `done`
+- source hashes stable: `true`; commands passed: `4`
+- existing production evidence reused: `false`; skipped commands: `0`
+- positive Main mutation, negative no-mutation, recovery and Chromium gates are recorded in the module receipt
+- dynamic source inventory: `3745` units; verified `454`; unverified `3291`; planning estimate `5200` (non-binding); this-segment binding delta: `12`
+- historical 6900-entry inventory remains read-only; full-family parity: `false`
+- nextTask: `NONE`