docs: fix dead links (lean-theorem-tree)

slsa.dev/dsse -> secure-systems-lab/dsse; delink private agi-forecast PR; org GitHub link; private Space framed honestly.

README.md

@@ -44,7 +44,7 @@ ecosystem-stage: generated-mirror
 [![Lean Kernel Green](https://img.shields.io/badge/Lean_4.13--kernel--green@c7c0ba17-22c55e?style=flat-square)](https://github.com/szl-holdings/lutar-lean/commit/c7c0ba17)
 [![Sorries](https://img.shields.io/badge/sorries-163-blue?style=flat-square)](https://github.com/szl-holdings/lutar-lean/commit/c7c0ba17)
 [![SLSA L1](https://img.shields.io/badge/SLSA-L1_SBOM+DCO-blue?style=flat-square)](https://slsa.dev)
-[![DSSE](https://img.shields.io/badge/DSSE-PAE_v1-22c55e?style=flat-square)](https://slsa.dev/dsse)
+[![DSSE](https://img.shields.io/badge/DSSE-PAE_v1-22c55e?style=flat-square)](https://github.com/secure-systems-lab/dsse)
 [![RAE-1](https://img.shields.io/badge/RAE--1-v1.0-D97757?style=flat-square)](https://github.com/szl-holdings/a11oy/pull/122)
 [![MCP](https://img.shields.io/badge/MCP-server_live-ff6b35?style=flat-square)](https://huggingface.co/spaces/SZLHOLDINGS/hatun-mcp)
 [![License](https://img.shields.io/badge/License-Apache_2.0-blue?style=flat-square)](https://www.apache.org/licenses/LICENSE-2.0)
@@ -71,7 +71,7 @@ Dependency-graph SNAPSHOT of the Lean 4 declarations in the Ouroboros corpus **a
 | Zenodo DOIs | 6 release + 1 concept alias | [10.5281/zenodo.20434276](https://doi.org/10.5281/zenodo.20434276) |
 | HF Models | 8 | [SZLHOLDINGS org](https://huggingface.co/SZLHOLDINGS) |
 | RAE-1 protocol | merged | [a11oy#122](https://github.com/szl-holdings/a11oy/pull/122) |
-| Putnam 2025 coverage | 10/12 structure · **4/12 GREEN Lean-discharged (A1, A5, B4, B6)** (5 baseline + 134 Putnam tracked) · 4 GREEN (A1/A5/B4/B6) · 2 TRACKED (A2/B1) · 6 staged-advisory (NOT proven) | [agi-forecast PR #51](https://github.com/szl-holdings/agi-forecast/pull/51) |
+| Putnam 2025 coverage | 10/12 structure · **4/12 GREEN Lean-discharged (A1, A5, B4, B6)** (5 baseline + 134 Putnam tracked) · 4 GREEN (A1/A5/B4/B6) · 2 TRACKED (A2/B1) · 6 staged-advisory (NOT proven) | agi-forecast PR #51 (private repo) |
 
 ## Cross-references