upstream-license compliance + rigor disclaimer + correct email

NOTICE

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+screenpipe-pii-redactor
+Copyright 2026 Mediar, Inc.
+
+This product is a derivative work of the OpenAI Privacy Filter
+(https://github.com/openai/privacy-filter), licensed under the
+Apache License, Version 2.0. The full upstream Apache 2.0 license
+text is preserved in LICENSE.upstream-apache2.txt.
+
+The base model architecture, tokenizer, and pretrained weights are the
+work of OpenAI and are licensed Apache 2.0. screenpipe-pii-redactor
+extends those weights via supervised fine-tuning on a custom corpus and
+re-initializes the output head for a 12-label PII taxonomy specific to
+desktop activity logs.
+
+Significant modifications introduced by this derivative:
+  - Output head re-initialized for a 12-class PII label space
+    (29 rows copied from upstream where labels aligned, 20 rows
+    initialized from random for new classes; see model/finetune_summary.json).
+  - Fine-tuned for 3 epochs on a mixed corpus of:
+      * synthetic accessibility / window-title / OCR data
+        (private — not redistributed)
+      * a 25% slice of ai4privacy/pii-masking-300k (CC-BY-4.0)
+        with labels mapped to the 12-class taxonomy
+      * targeted secret-shape augmentation (private)
+  - Context window n_ctx raised from 128 to 256.
+  - Hyperparameters: batch_size=4, lr=1e-4, weight_decay=0,
+    max_grad_norm=1.0, shuffle_seed=1337.
+
+Distribution license:
+
+  - The fine-tuned weights and accompanying materials in this repository
+    (the "Derivative Work") are licensed under CC BY-NC 4.0; see LICENSE.
+  - The Apache 2.0 obligations on the base model are preserved by:
+    (a) shipping LICENSE.upstream-apache2.txt with this repo,
+    (b) attributing OpenAI Privacy Filter in README.md,
+    (c) declaring significant modifications above.
+  - "OpenAI" and "Privacy Filter" are trademarks / brands of OpenAI; this
+    derivative does not use those marks to endorse or suggest endorsement
+    of this work by OpenAI.
+
+Third-party datasets used during fine-tuning:
+
+  - ai4privacy/pii-masking-300k
+    https://huggingface.co/datasets/ai4privacy/pii-masking-300k
+    Licensed CC-BY-4.0.
+
+Questions about license compatibility or commercial use:
+  hi@louis030195.com