fix: address CodeRabbit review comments

- Escape pipe and newline characters in adopter table cells
- Fail fast if ADOPTERS markers are missing or ambiguous in README
- Hyphenate "full-stack" compound adjective in README

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Debanitrkl

.github/workflows/sync-adopters.yaml

@@ -23,6 +23,9 @@ jobs:
           with open("USERS.md") as f:
               lines = f.read().strip().split("\n")
 
+          def esc_cell(value: str) -> str:
+              return value.replace("\n", " ").replace("|", r"\|").strip()
+
           rows = []
           for line in lines:
               if not line.startswith("|"):
@@ -35,20 +38,23 @@ jobs:
               if org == "Organization" or org.startswith("---") or org.startswith("--"):
                   continue
               desc = parts[3]
-              rows.append(f"| {org} | {desc} |")
+              rows.append(f"| {esc_cell(org)} | {esc_cell(desc)} |")
 
           table = "| Organization | Description of Use |\n| --- | --- |\n" + "\n".join(rows)
 
           # Replace content between markers in README.md
           with open("README.md") as f:
               readme = f.read()
 
-          readme = re.sub(
+          pattern = re.compile(
               r"(<!-- ADOPTERS:START -->\n).*?(\n<!-- ADOPTERS:END -->)",
-              rf"\g<1>{table}\g<2>",
-              readme,
               flags=re.DOTALL,
           )
+          readme, replaced = pattern.subn(
+              rf"\g<1>{table}\g<2>", readme, count=1
+          )
+          if replaced != 1:
+              raise SystemExit("Expected exactly one ADOPTERS block in README.md")
 
           with open("README.md", "w") as f:
               f.write(readme)

README.md

@@ -17,7 +17,7 @@
 
 </div>
 
-Parseable is a full stack observability platform built to ingest, analyze and extract insights from all types of telemetry (MELT) data. You can run Parseable on your local machine, in the cloud, or use [Parseable Cloud](https://app.parseable.com) — the fully managed service. To experience Parseable UI, checkout [demo.parseable.com ↗︎](https://demo.parseable.com/login).
+Parseable is a full-stack observability platform built to ingest, analyze and extract insights from all types of telemetry (MELT) data. You can run Parseable on your local machine, in the cloud, or use [Parseable Cloud](https://app.parseable.com) — the fully managed service. To experience Parseable UI, checkout [demo.parseable.com ↗︎](https://demo.parseable.com/login).
 
 <div align="center">
 <h3>